{"title":"CSI Math Mysteries","description":"\u003cp\u003eTurn math review into an engaging detective investigation with \u003cstrong\u003eCSI Math Mysteries\u003c\/strong\u003e from Kiwiland Education. These \u003cstrong\u003eprintable math mystery worksheets\u003c\/strong\u003e help students practice key math skills while solving clues, eliminating suspects, and cracking the case.\u003c\/p\u003e\n\n\u003cp\u003eEach \u003cstrong\u003eCSI Math Mystery\u003c\/strong\u003e combines a story-based investigation with standards-aligned math practice, making it ideal for \u003cstrong\u003eGrade 3, Grade 4, Grade 5, Grade 6, Grade 7, and middle school math review\u003c\/strong\u003e. Students use problem-solving, logic, and mathematical reasoning as they work through clue-based activities and uncover the final answer.\u003c\/p\u003e\n\n\u003cp\u003eCSI Math Mysteries are perfect for \u003cstrong\u003emath centers, early finishers, sub plans, test prep, homeschool math, enrichment, intervention, back-to-school review, and end-of-year activities\u003c\/strong\u003e. Topics include multiplication, division, place value, fractions, decimals, integers, geometry, measurement, and more.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e These are printable PDF resources. No apps, passwords, or digital locks are required.\u003c\/p\u003e\n","products":[{"product_id":"long-division-csi-math-mystery-activity","title":"Long Division CSI Math Mystery Worksheets | Grades 4–6 | The Divided Monster","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eSomething is stalking the halls of Monster School — a creature known only as the Divided Monster — and only the sharpest math detectives can identify it. This printable \u003cstrong\u003eLong Division CSI Math Mystery\u003c\/strong\u003e turns division practice into a detective investigation, built for \u003cstrong\u003eGrades 4–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with long division and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 4–6 (best for Grades 4–5)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Basic division facts (1–12), dividing 3- and 4-digit numbers by 1-digit (with and without remainders), and division word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 20 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eSomething strange is stalking the halls of Monster School — a creature known only as the Divided Monster. No one has seen its full form, and the only way to identify it is to work through the division clues it leaves behind. Your students are the detectives on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve long division clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the Divided Monster remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the division and unmask the Divided Monster? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBasic division facts (1–12)\u003c\/li\u003e\n  \u003cli\u003eDividing 3-digit numbers by 1-digit (no remainders)\u003c\/li\u003e\n  \u003cli\u003eDividing 4-digit numbers by 1-digit (with and without remainders)\u003c\/li\u003e\n  \u003cli\u003eDivision word problems\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style long division mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eLong division clue worksheets and puzzles\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLong division practice and review\u003c\/li\u003e\n  \u003cli\u003eEnd-of-unit division wrap-up\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52002732147058,"sku":"9571010","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/Division-1.png?v=1747715089"},{"product_id":"addition-subtraction-summer-csi-math-mystery","title":"Summer Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–5 | The Missing Hot Dogs","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eIt is the summer cookout of the year — the grill is hot, the buns are ready — but every last hot dog has vanished. This printable \u003cstrong\u003eSummer Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e turns math review into a detective investigation, built for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 2–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Subtraction from 100, 3-digit addition with regrouping, multi-digit add\/subtract, and word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 28 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is the summer cookout of the year. The grill is fired up, the buns are toasted, the families are gathered — but when it is time to eat, every last hot dog has vanished. The cookout is about to be ruined, and your students are the detectives on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues — including word problems — to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the hot dog thief remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and recover the missing hot dogs before the cookout is over? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSubtraction from 100 (2-digit numbers)\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eMixed 3-digit addition and subtraction\u003c\/li\u003e\n  \u003cli\u003eMulti-digit addition\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction word problems\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style summer addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and word problems\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSummer and back-to-school math activities\u003c\/li\u003e\n  \u003cli\u003eEnd-of-year review and summer school\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52106387587442,"sku":"9566799","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/Addition-and-Subtraction-1.png?v=1748229928"},{"product_id":"fall-csi-math-mystery-multiplication-division","title":"Fall Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–6 | The Missing Leaves","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTransform fall multiplication and division review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eFall Multiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with multiplication and division and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts up to 12 × 12\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 17 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eAutumn has arrived, but something is wrong. The trees should be covered in red, orange, and gold — instead the leaves keep vanishing before they can fall. A Fall Villain is stealing the season's colors one tree at a time, and your students are on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication and division clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the Fall Villain remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and stop the Fall Villain before the trees are bare? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts up to 12 × 12\u003c\/li\u003e\n  \u003cli\u003eDivision facts connected to those multiplication facts\u003c\/li\u003e\n  \u003cli\u003eMath fact fluency and reasoning\u003c\/li\u003e\n  \u003cli\u003eReading clues and eliminating incorrect options\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eFall mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003ePuzzle-style clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFall, Halloween, and Thanksgiving math activities\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division fact practice\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52173781533042,"sku":"12470937","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/FallMultiplicationandDivisionMathMystery1.png?v=1748381291"},{"product_id":"multiplication-csi-math-mystery-halloween-monster-madness","title":"Multiplication CSI Math Mystery Worksheets | Grades 4–6 | Monster Madness","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eThe monsters are loose and the town is in chaos — and only the sharpest math detectives can work out which one is behind the madness. This printable \u003cstrong\u003eMultiplication CSI Math Mystery\u003c\/strong\u003e turns fact review into a detective investigation, built for \u003cstrong\u003eGrades 4–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with multiplication and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 4–6 (best for Grades 4–5)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e 2-by-1-digit multiplication, multiplication facts, a multiplication maze and match-up, and word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 20 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is Halloween, and the monsters are out of control. Doors are slamming, lights are flickering, and the whole town has descended into Monster Madness. One monster is behind it all — and your students are the only detectives who can figure out which one.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication clues to gather evidence and rule each monster out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the monster behind the madness remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and unmask the culprit before Halloween night is ruined? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e2-by-1-digit multiplication\u003c\/li\u003e\n  \u003cli\u003eMultiplication basic facts\u003c\/li\u003e\n  \u003cli\u003eA multiplication maze\u003c\/li\u003e\n  \u003cli\u003eA multiplication match-up activity\u003c\/li\u003e\n  \u003cli\u003eMultiplication word problems\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication mystery activity\u003c\/li\u003e\n  \u003cli\u003eHalloween mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMultiplication clue worksheets, a maze, and a match-up\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHalloween and October math activities\u003c\/li\u003e\n  \u003cli\u003eMultiplication fact practice and review\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52173838418290,"sku":"12371734","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/Multiplication1.png?v=1748382945"},{"product_id":"place-value-csi-math-mystery-ai-classroom-takeover","title":"Place Value CSI Math Mystery Worksheets | Grades 3–6 | AI Classroom Takeover","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eMake place value and number sense review feel like a case worth cracking. This printable \u003cstrong\u003ePlace Value CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with place value, number sense, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Place value to 1000, 10\/100 more and less, comparing and ordering numbers, word form, and adding\/subtracting tens, hundreds, and thousands\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 19 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eThe classroom has been taken over by a rogue AI. The screens are glitching, the lights are flickering, and the machine will not back down until someone outsmarts it. Your students are the only ones who can crack the code and shut it down.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve place value and number sense clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until the AI behind the takeover is revealed.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and stop the AI Classroom Takeover? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePlace value to 1000\u003c\/li\u003e\n  \u003cli\u003e10 more \/ 10 less and 100 more \/ 100 less\u003c\/li\u003e\n  \u003cli\u003eComparing numbers (greater than \/ less than)\u003c\/li\u003e\n  \u003cli\u003eOrdering numbers in the hundreds and thousands\u003c\/li\u003e\n  \u003cli\u003eReading and writing numbers in word form\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style place value mystery activity\u003c\/li\u003e\n  \u003cli\u003eAI-themed mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003ePlace value and number sense clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBack-to-school and start-of-year review\u003c\/li\u003e\n  \u003cli\u003eNumber sense and place value practice\u003c\/li\u003e\n  \u003cli\u003eEnd-of-year spiral review\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups and homeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52173873447282,"sku":"12212740","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/PlaceValueMathMysteryCSI1.png?v=1748383842"},{"product_id":"multiplication-division-csi-math-mystery-ai-classroom-takeover","title":"Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–6 | AI Classroom Takeover","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eThe classroom computers have been hacked, the smartboard has a mind of its own, and an AI has taken over the room. This printable \u003cstrong\u003eMultiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e turns fact review into a detective investigation, built for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with multiplication and division and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 3–5)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts up to 12 × 12\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 17 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eSomething has gone very wrong in the classroom. The computers have been hacked, the smartboard is glitching, and an AI has seized control of the whole room. It will not power down until someone proves they are smarter than the machine. That is where your students come in.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication and division clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until the AI behind the takeover is revealed.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and shut down the AI Classroom Takeover? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts up to 12 × 12\u003c\/li\u003e\n  \u003cli\u003eDivision facts connected to those multiplication facts\u003c\/li\u003e\n  \u003cli\u003eMath fact fluency and reasoning\u003c\/li\u003e\n  \u003cli\u003eReading clues and eliminating incorrect options\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eAI-themed mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003ePuzzle-style clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBack-to-school and end-of-year review\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division fact practice\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52173909262706,"sku":"11976640","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/MultiplicationandDivisionCSIMathMystery1.png?v=1748384781"},{"product_id":"addition-subtraction-csi-math-mystery-ai-classroom-takeover","title":"Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 3–5 | AI Classroom Takeover","description":"\u003cp\u003eTurn addition and subtraction review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eAddition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003e3rd, 4th, and 5th grade classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and regrouping. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e 3rd, 4th, and 5th grade\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Addition, subtraction, regrouping, and problem solving\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 16 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eYou wake up excited for another day of learning — but the moment you walk into the classroom, something feels very wrong. The lights are flickering. The computers are flashing cryptic messages. Your teacher pulls you aside and explains in a hushed voice that a rogue AI has taken over the school's entire digital system.\u003c\/p\u003e\n\n\u003cp\u003eThe AI has locked down every computer and is sending out strange puzzles and riddles, toying with students and teachers alike. But there is a way out: if your class can solve the AI's challenges, piece together the clues, and uncover the villain's name, you can take back control and save the school day.\u003c\/p\u003e\n\n\u003cp\u003eIt is time to become digital detectives. Work together, follow the evidence, and use your math skills to outsmart the rogue program before the clock runs out. The fate of your classroom is in your hands.\u003c\/p\u003e\n\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdding multiple 2-digit numbers\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eSubtraction from 1,000\u003c\/li\u003e\n  \u003cli\u003e3-digit subtraction with regrouping\u003c\/li\u003e\n  \u003cli\u003eNumber sense and careful calculation\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style math mystery activity\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction clue pages\u003c\/li\u003e\n  \u003cli\u003eSuspect elimination activity\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBack-to-school and end-of-year review\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups and independent work\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n  \u003cli\u003eEnd-of-unit review\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction practice and reinforcement\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52173970735474,"sku":"11976567","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/addition-subtraction-csi-math-mystery-worksheets-grades-3-5.png?v=1781647041"},{"product_id":"earth-day-csi-math-mystery-multiplication-division","title":"Earth Day Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–6 | The Eco-Villain","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn Earth Day multiplication and division review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eEarth Day Multiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with multiplication and division and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts up to 12 × 12\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 17 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is almost Earth Day, but someone is determined to ruin the celebration. An Eco-Villain has been sabotaging the clean-up — overflowing the bins, scattering litter, and undoing the school's hard work. The community needs your students to track the culprit down.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication and division clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the Eco-Villain remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and catch the Eco-Villain in time for Earth Day? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts up to 12 × 12\u003c\/li\u003e\n  \u003cli\u003eDivision facts connected to those multiplication facts\u003c\/li\u003e\n  \u003cli\u003eMath fact fluency and reasoning\u003c\/li\u003e\n  \u003cli\u003eReading clues and eliminating incorrect options\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eEarth Day mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003ePuzzle-style clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEarth Day and April\/May math activities\u003c\/li\u003e\n  \u003cli\u003eSpring math review and centers\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division fact practice\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52174002520434,"sku":"11400322","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/EarthDayCSIMathMysteryActivity1.png?v=1748387246"},{"product_id":"easter-csi-math-mystery-multiplication-division-missing-eggs","title":"Easter Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–6 | The Missing Easter Eggs","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTransform Easter multiplication and division review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eEaster Multiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with multiplication and division and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts up to 12 × 12\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 19 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eThe Easter egg hunt is about to begin, but there is a problem — all the eggs have disappeared. The baskets are empty, the hiding spots are bare, and the children are about to arrive. Someone has taken the Easter eggs, and your students are the detectives on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication and division clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the egg thief remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and recover the missing Easter eggs before the hunt begins? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts up to 12 × 12\u003c\/li\u003e\n  \u003cli\u003eDivision facts connected to those multiplication facts\u003c\/li\u003e\n  \u003cli\u003eMath fact fluency and reasoning\u003c\/li\u003e\n  \u003cli\u003eReading clues and eliminating incorrect options\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eEaster mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003ePuzzle-style clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEaster and spring math activities\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division fact practice\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52183360831858,"sku":"11194542","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/EasterCSIMathMystery1.png?v=1748402748"},{"product_id":"st-patricks-day-csi-math-mystery-multiplication-division-missing-gold","title":"St. Patrick’s Day Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–6 | The Missing Gold","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eThe leprechaun's pot of gold has vanished right before St. Patrick's Day, and the whole village is in a panic. This printable \u003cstrong\u003eSt. Patrick's Day Multiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e turns fact review into a detective investigation, built for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with multiplication and division and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts up to 12 × 12\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 19 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is almost St. Patrick's Day, and the leprechaun's pot of gold has vanished from the end of the rainbow. Without it, there will be no luck and no celebration. The trail is fresh, the suspects are many, and your students are the detectives on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication and division clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the gold thief remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and recover the missing gold before St. Patrick's Day? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts up to 12 × 12\u003c\/li\u003e\n  \u003cli\u003eDivision facts connected to those multiplication facts\u003c\/li\u003e\n  \u003cli\u003eMath fact fluency and reasoning\u003c\/li\u003e\n  \u003cli\u003eReading clues and eliminating incorrect options\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eSt. Patrick's Day mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003ePuzzle-style clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSt. Patrick's Day and March math activities\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division fact practice\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52183396942194,"sku":"11080924","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/StPatricksDayCSIMathMystery1.png?v=1748403522"},{"product_id":"decimals-csi-math-mystery-alien-invasion-worksheets","title":"Decimals CSI Math Mystery Worksheets | Grades 4–7 | Alien Invasion","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn decimal review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eDecimals CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 4–7 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with decimals and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 4–7 (best for Grade 5)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Adding, subtracting, multiplying, and rounding decimals to the hundredths\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 19 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eEarth is under threat. An alien invasion is closing in, and the only way to stop it is to crack the code the invaders left behind. The clock is ticking — and your students are the investigators on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students work through a stack of decimal clues, solving problems that involve adding, subtracting, multiplying, and rounding decimals to the hundredths. Each correct answer is a piece of evidence that helps them rule a suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved puzzle, the suspect list shrinks. One name is crossed off here, another there, until only the true culprit behind the invasion is left standing.\u003c\/p\u003e\n\u003cp\u003eCan your investigators solve the decimals and save Earth before the aliens take over? Sharpen those pencils and crack the Alien Invasion case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdding and subtracting decimals to the hundredths\u003c\/li\u003e\n  \u003cli\u003eMultiplying decimals\u003c\/li\u003e\n  \u003cli\u003eRounding decimals to the nearest hundredth\u003c\/li\u003e\n  \u003cli\u003eDecimal place value and reasoning\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style decimals mystery activity\u003c\/li\u003e\n  \u003cli\u003eDecimal puzzle clue worksheets\u003c\/li\u003e\n  \u003cli\u003eSuspect elimination activity\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDecimal review and math test prep\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups and independent work\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n  \u003cli\u003eEnd-of-unit and end-of-year review\u003c\/li\u003e\n  \u003cli\u003eSpiral review throughout the year\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52183424598386,"sku":"10876032","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/Decimals5thGrade1.png?v=1748404277"},{"product_id":"summer-school-csi-math-mystery-addition-subtraction-worksheets","title":"Summer School Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 3–6 | The Missing Teacher","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eMake summer school addition and subtraction review feel like a case worth cracking. This printable \u003cstrong\u003eSummer School Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 3–5)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Adding multiple 2-digit numbers, 3-digit addition with regrouping, and subtraction from 1000\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 26 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is the first day of summer school, the students are in their seats — but the teacher is nowhere to be found. The lesson plans are on the desk, the coffee is still warm, yet the teacher has vanished without a trace. Your students will have to crack the case themselves.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the culprit behind the disappearance remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and find the missing summer school teacher? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdding multiple 2-digit numbers\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eSubtraction from 1000\u003c\/li\u003e\n  \u003cli\u003e3-digit subtraction with regrouping\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eSummer mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and puzzles\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSummer school and end-of-year review\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction regrouping practice\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52240555606386,"sku":"9653294","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/Summer-Math-Mystery-CSI-1.png?v=1748551332"},{"product_id":"winter-csi-math-mystery-multiplication-division-gingerbread-house","title":"Winter Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–6 | The Gingerbread House","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eSomeone has been raiding the gingerbread house, and pieces keep going missing overnight. This printable \u003cstrong\u003eWinter Multiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e turns fact review into a detective investigation, built for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with multiplication and division and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication facts to 12 × 12, division, and word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 19 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eThe winter bake-off is almost here, and the prize-winning gingerbread house is the talk of the town — until pieces start disappearing. A gumdrop here, a candy cane there, and now whole walls are going missing overnight. Someone has been raiding the gingerbread house, and your students are on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication and division clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the gingerbread bandit remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and catch the culprit before the gingerbread house is gone? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts to 12 × 12\u003c\/li\u003e\n  \u003cli\u003eDivision practice connected to multiplication facts\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division word problems\u003c\/li\u003e\n  \u003cli\u003eMath fact fluency and reasoning\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eWinter mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and word problems\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWinter and December math activities\u003c\/li\u003e\n  \u003cli\u003eHoliday math centers and review (Christmas without being Christmas-specific)\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division fact practice\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52292493214066,"sku":"10527782","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/WinterMultiplicationandDivision1.webp?v=1749064439"},{"product_id":"thanksgiving-csi-math-mystery-multiplication-division-pumpkin-pie","title":"Thanksgiving Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–6 | The Missing Pumpkin Pie","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn multiplication and division review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eThanksgiving Multiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with multiplication and division and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts up to 12 × 12, plus word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 19 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is Thanksgiving, the table is set, and the family is ready for dessert — but the pumpkin pie has vanished. The star of the whole meal is gone from the kitchen, and dinner is almost over. Someone took it, and your students are the detectives on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication and division clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the pie thief remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and recover the pumpkin pie before dessert is ruined? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts up to 12 × 12\u003c\/li\u003e\n  \u003cli\u003eDivision facts connected to those multiplication facts\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division word problems\u003c\/li\u003e\n  \u003cli\u003eMath fact fluency and reasoning\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eThanksgiving mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and word problems\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThanksgiving and fall math activities\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division fact practice\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52292507631986,"sku":"10354877","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/Thanksgiving1.webp?v=1749065170"},{"product_id":"place-value-csi-math-mystery-pirate-worksheets","title":"Place Value CSI Math Mystery Worksheets | Grades 3–6 | The Pizza Pirate","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eThere is a pirate loose at the pizza shop, and slices keep vanishing off the counter faster than they can be served. This printable \u003cstrong\u003ePlace Value CSI Math Mystery\u003c\/strong\u003e turns number-sense review into a detective investigation, built for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with place value, number sense, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Place value to 1,000, 10\/100 more and less, comparing and ordering numbers, and add\/subtract with tens, hundreds, and thousands\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 26 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eThere is a pirate loose at the pizza shop, and slices keep disappearing faster than they can be served. The Pizza Pirate is swiping pizzas right off the counter — and the only way to catch the culprit is to follow the place value clues left behind. Your students are the detectives on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of place value clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the Pizza Pirate remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and catch the Pizza Pirate before the last slice is gone? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePlace value to 1,000\u003c\/li\u003e\n  \u003cli\u003e10 more \/ 10 less and 100 more \/ 100 less\u003c\/li\u003e\n  \u003cli\u003eComparing and ordering numbers in the hundreds and thousands\u003c\/li\u003e\n  \u003cli\u003eGreater than and less than\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction with tens, hundreds, and thousands\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style place value mystery activity\u003c\/li\u003e\n  \u003cli\u003ePirate-themed mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003ePlace value clue worksheets and puzzles\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBack-to-school place value review\u003c\/li\u003e\n  \u003cli\u003eNumber sense and place value practice\u003c\/li\u003e\n  \u003cli\u003eEnd-of-year spiral review\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups and homeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52292775543154,"sku":"10131652","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/PlaceValue1.webp?v=1755208010"},{"product_id":"matariki-new-zealand-csi-math-mystery-addition-and-subtraction","title":"Matariki Addition \u0026 Subtraction CSI Math Mystery Worksheets | Years 4–6 | The Missing Kumara","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eBring your Matariki maths review to life as a detective investigation your students won't want to put down. This printable \u003cstrong\u003eMatariki Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eYears 4–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused maths practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eYear Levels:\u003c\/strong\u003e Years 4–6 (also suits able Year 3s and Year 7s needing support)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMaths Skills:\u003c\/strong\u003e Subtraction from 100, 2-digit addition with regrouping, 3-digit and 1-digit addition\/subtraction, and multi-step word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 22 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Maths centres, relief plans, early finishers, review, small groups, and homeschool maths\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is Matariki, the Māori New Year, and the whānau is preparing a traditional hāngi to celebrate. Everything is ready — except the kumara has gone missing from the kete. Without it, the hāngi will not be complete, and the celebration is only hours away. Your students are the detectives on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the one who took the kumara remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and find the missing kumara in time for the hāngi? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSubtraction from 100 (2-digit numbers)\u003c\/li\u003e\n  \u003cli\u003e2-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction with 3-digit and 1-digit numbers\u003c\/li\u003e\n  \u003cli\u003eMulti-digit addition\u003c\/li\u003e\n  \u003cli\u003eMulti-step addition and subtraction word problems\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style Matariki addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eA light use of Te Reo Māori for cultural connection\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMaths clue worksheets and word problems\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColour and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMatariki and Māori New Year activities\u003c\/li\u003e\n  \u003cli\u003eNew Zealand classroom maths review\u003c\/li\u003e\n  \u003cli\u003eCultural and cross-curricular studies\u003c\/li\u003e\n  \u003cli\u003eMaths centres, early finishers, and relief plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups and homeschool maths\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52292797792626,"sku":"9663494","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/Matariki-1.webp?v=1749073598"},{"product_id":"addition-subtraction-csi-math-mystery-grades-3-5-missing-dragon-eggs","title":"Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 3–6 | The Missing Dragon Eggs","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eThe dragon eggs have vanished from the royal nest, and the kingdom is in an uproar — without them, there will be no new dragons. This printable \u003cstrong\u003eAddition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e turns math review into a detective investigation, built for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 4–5)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Adding multiple 2- and 3-digit numbers, 3-digit addition with regrouping, and subtraction from 1000\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 26 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eDeep in the kingdom, the dragon eggs have vanished from the royal nest. The guards saw nothing, the nest is empty, and without the eggs there will be no new dragons. The realm is counting on your students to track down whoever pulled off the heist.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the egg thief remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and recover the missing dragon eggs before they hatch in the wrong hands? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdding multiple 2-digit numbers\u003c\/li\u003e\n  \u003cli\u003eAdding 3-digit numbers\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eSubtraction from 1000\u003c\/li\u003e\n  \u003cli\u003e3-digit subtraction with regrouping\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eFantasy mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and puzzles\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBack-to-school and end-of-year review\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction regrouping practice\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52309264695666,"sku":"9597857","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/Addition-and-Subtraction-1.webp?v=1749422945"},{"product_id":"multiplication-division-csi-math-mystery-missing-medallion","title":"Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–6 | The Missing Medallion","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn multiplication and division review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eMultiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with multiplication and division and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts up to 12 × 12, plus word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 19 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eThe museum's most prized treasure — the legendary Medallion — has vanished from its display case overnight. Security saw nothing. The alarms never sounded. And now it's up to your students to find out who pulled off the heist.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students work the case one clue at a time, solving multiplication and division problems up to 12 × 12. Each answer unlocks a piece of evidence and helps them rule a suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of suspects gets shorter. One name is cleared here, another there, until only the real thief is left standing.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the math and recover the Medallion before the trail goes cold? Sharpen those pencils and solve the case of the Missing Medallion.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts up to 12 × 12\u003c\/li\u003e\n  \u003cli\u003eDivision facts connected to those multiplication facts\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division word problems\u003c\/li\u003e\n  \u003cli\u003eMath fact fluency and reasoning\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eClue-based puzzle worksheets\u003c\/li\u003e\n  \u003cli\u003eSuspect elimination logic activity\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBack-to-school or end-of-year review\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division fact practice\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups and independent work\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n  \u003cli\u003eFall or spring math units\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52309356380530,"sku":"9486829","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/Multiplication-and-Division-1.webp?v=1749437391"},{"product_id":"spring-csi-math-mystery-addition-subtraction-worksheets","title":"Spring Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–5 | The Missing Flowers","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTransform spring addition and subtraction review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eSpring Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 2–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Subtraction from 100, 3-digit addition with regrouping, multi-digit add\/subtract, and word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 28 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eSpring has arrived and the garden should be bursting with color — but the flowers have vanished. Every bloom has disappeared overnight, leaving nothing but bare stems behind. Someone has taken the flowers, and your students are the detectives called in to find out who.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues — including word problems — to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the flower thief remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and recover the missing flowers before spring is ruined? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSubtraction from 100 (2-digit numbers)\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eMixed 3-digit addition and subtraction\u003c\/li\u003e\n  \u003cli\u003eMulti-digit addition\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction word problems\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style spring addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and word problems\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpring and Easter math activities\u003c\/li\u003e\n  \u003cli\u003ePost-break and spring math review\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52309548171634,"sku":"9425399","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/SpringCSIMathMystery1.webp?v=1749458492"},{"product_id":"earth-day-csi-math-mystery-addition-subtraction-worksheets","title":"Earth Day Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–5 | The Missing Recycling Bins","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eMake Earth Day addition and subtraction review feel like a case worth cracking. This printable \u003cstrong\u003eEarth Day Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 2–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Subtraction from 100, 3-digit addition with regrouping, multi-digit add\/subtract, and word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 28 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is almost Earth Day, and the whole school is ready to celebrate — until the recycling bins go missing. Every single one has vanished overnight, and without them the big clean-up can't happen. Someone took them, and your students are the detectives on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues — including word problems — to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the culprit who took the bins remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and recover the recycling bins in time for Earth Day? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSubtraction from 100 (2-digit numbers)\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003e3-digit addition and subtraction\u003c\/li\u003e\n  \u003cli\u003eMulti-digit addition\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction word problems\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style Earth Day addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and word problems\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEarth Day and April math activities\u003c\/li\u003e\n  \u003cli\u003eSpring math centers and review\u003c\/li\u003e\n  \u003cli\u003eEarly finishers and enrichment\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52309599158642,"sku":"9369396","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/EarthDayMathMysteryAdditionandSubtraction1.webp?v=1749459195"},{"product_id":"multiply-divide-integers-csi-math-mystery-worksheets","title":"Multiply \u0026 Divide Integers CSI Math Mystery Worksheets | Grades 6–9 | Zombie Leader","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn multiplying and dividing integers review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eMultiply \u0026amp; Divide Integers CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 6–9 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with integer operations and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 6–9 (best for Grades 6–7)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplying and dividing integers up to ±12, including word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 16 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eA zombie outbreak is sweeping through the city, and every trail leads back to one source: the Zombie Leader, the very first to be infected. Find Patient Zero and there is still a chance to stop the spread. Your students are the math detectives on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve integer clues — multiplying and dividing positive and negative numbers — to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the Zombie Leader remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the integers and identify Patient Zero before the outbreak spreads? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplying integers up to ±12\u003c\/li\u003e\n  \u003cli\u003eDividing integers up to ±12\u003c\/li\u003e\n  \u003cli\u003eReasoning with positive and negative numbers\u003c\/li\u003e\n  \u003cli\u003eInteger word problems\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiply and divide integers mystery activity\u003c\/li\u003e\n  \u003cli\u003ePuzzle-based worksheets with mystery storyline\u003c\/li\u003e\n  \u003cli\u003eSuspect elimination chart\u003c\/li\u003e\n  \u003cli\u003eAnswer keys for all tasks\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHalloween and fall math review\u003c\/li\u003e\n  \u003cli\u003eInteger multiplication and division practice\u003c\/li\u003e\n  \u003cli\u003eMiddle school RTI or intervention\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eHomeschool math and end-of-year review\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52309698969970,"sku":"9281271","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/MultiplyingandDividingIntegers1.webp?v=1749463273"},{"product_id":"groundhog-day-csi-math-mystery-addition-subtraction-worksheets","title":"Groundhog Day Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–5 | The Missing Groundhog","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eIt is the morning of Groundhog Day, the crowd is gathering — but the groundhog is nowhere to be found. This printable \u003cstrong\u003eGroundhog Day Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e turns math review into a detective investigation, built for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 2–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Subtraction from 100, 3-digit addition with regrouping, mixed add\/subtract to 1000, and word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 28 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is the morning of Groundhog Day. The crowd has gathered, the cameras are ready — but the star of the show has vanished. The groundhog is gone, and without it there will be no shadow and no forecast. Someone has taken the groundhog, and it is up to your students to find out who.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues — including word problems — to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the groundhog-napper remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and find the missing groundhog before the big moment? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSubtracting 2-digit numbers from 100\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eMixed addition and subtraction to 1000\u003c\/li\u003e\n  \u003cli\u003eMulti-digit addition\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction word problems\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style Groundhog Day addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and word problems\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eGroundhog Day and February math activities\u003c\/li\u003e\n  \u003cli\u003eWinter math centers and review\u003c\/li\u003e\n  \u003cli\u003eEarly finishers and back-from-break activities\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52309751333234,"sku":"9040962","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/GroundhogDayMath1.webp?v=1749465814"},{"product_id":"winter-csi-math-mystery-addition-subtraction-worksheets","title":"Winter Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–5 | The Big Freeze","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn winter addition and subtraction review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eWinter Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 2–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e 3-digit addition with regrouping, subtraction from 100 and 1000, multi-digit add\/subtract, and word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 28 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eYour students walk into class one morning and something is terribly wrong. Icicles hang from the desks, the pencils are frozen solid, and everything is too cold to touch. The whole classroom has been turned into an icy wasteland — and someone is behind the Big Freeze.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues — including word problems — to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the villain behind the freeze remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and thaw the classroom before everyone turns to ice? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eSubtraction from 100 and from 1000\u003c\/li\u003e\n  \u003cli\u003eMixed 3-digit addition and subtraction\u003c\/li\u003e\n  \u003cli\u003eMulti-digit addition\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction word problems\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style winter addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and word problems\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWinter and January\/February math activities\u003c\/li\u003e\n  \u003cli\u003eSeasonal math review and centers\u003c\/li\u003e\n  \u003cli\u003eEarly finishers and enrichment\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52310638788978,"sku":"8721476","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/WinterCSIMathMysteryAdditionandSubtraction1.webp?v=1749497706"},{"product_id":"halloween-csi-math-mystery-addition-subtraction-worksheets","title":"Halloween Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–5 | The Witch's Brew","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eA witch is in trouble — her magical brewing ingredients have vanished under the full moon, and the potion is due tonight. This printable \u003cstrong\u003eHalloween Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e turns math review into a detective investigation, built for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grade 4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Subtraction from 100, 3-digit addition with regrouping, multi-digit add\/subtract, and word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 28 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eA witch is in serious trouble. Her magical ingredients — Dead Sea Salt, Vile Toad Skin, and Snake Skull — have mysteriously vanished under the full moon, and without them her brew will never be ready in time. She needs your students' detective skills to track down who took them.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues — including word problems — to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the ingredient thief remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and save the Witch's Brew before the full moon fades? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSubtraction from 100 (2-digit numbers)\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eMixed 3-digit addition and subtraction\u003c\/li\u003e\n  \u003cli\u003eMulti-digit addition\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction word problems with regrouping\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style Halloween addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and word problems\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHalloween and October math activities\u003c\/li\u003e\n  \u003cli\u003eFall math centers and spooky review days\u003c\/li\u003e\n  \u003cli\u003eEarly finishers and enrichment\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52310720282994,"sku":"8595503","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/HalloweenCSIMathMysteryAdditionandSubtraction1.webp?v=1749499109"},{"product_id":"fall-csi-math-mystery-addition-subtraction-worksheets","title":"Fall Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–5 | Who Stole the Colors?","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn fall addition and subtraction review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eFall Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 2–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Subtraction from 100, 3-digit addition with regrouping, multi-digit add\/subtract, and word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 28 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eSomething strange is happening this autumn. The leaves should be turning brilliant shades of red, orange, and gold — but instead the color is fading away. Someone, or something, is stealing the colors of fall, and your students have been called in to investigate before the season turns gray for good.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues — including word problems — to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the color thief remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and bring the colors of fall back? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSubtraction from 100 (2-digit numbers)\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eMixed 3-digit addition and subtraction\u003c\/li\u003e\n  \u003cli\u003eMulti-digit addition\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction word problems\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style fall addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and word problems\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFall and autumn math activities\u003c\/li\u003e\n  \u003cli\u003eHalloween and Thanksgiving math review\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52310872654194,"sku":"8569960","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/FallMathMystery1.webp?v=1749502179"},{"product_id":"skip-counting-place-value-csi-math-mystery-grades-1-2","title":"Skip Counting \u0026 Place Value CSI Math Mystery Worksheets | Grades 1–3 | The Missing Burger","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eLunch is served — except your Super Deluxe Mega Burger just landed at the wrong table, and someone is about to take a bite. This printable \u003cstrong\u003eSkip Counting \u0026amp; Place Value CSI Math Mystery\u003c\/strong\u003e turns number-sense review into a detective investigation, built for \u003cstrong\u003eGrades 1–3 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with place value, number patterns, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 1–3 (best for Grades 1–2)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Skip counting by 2s, 5s, and 10s, base ten blocks, comparing and ordering numbers to 1000\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 28 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is lunchtime at the diner, and you have ordered the one and only Super Deluxe Mega Burger. But when the food arrives, your burger is gone — the waitress delivered it to the wrong table by mistake. Now it could be anywhere, and someone is about to take a big bite. There is no time to lose.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of skip counting and place value clues to gather evidence and work out who ended up with the burger. Each correct answer helps them rule a table out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the table with the missing burger remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and track down the Super Deluxe Mega Burger before it is eaten? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSkip counting by 2s, 5s, and 10s\u003c\/li\u003e\n  \u003cli\u003eOne less than a number\u003c\/li\u003e\n  \u003cli\u003eBase ten blocks\u003c\/li\u003e\n  \u003cli\u003eComparing numbers (greater than \/ less than)\u003c\/li\u003e\n  \u003cli\u003eOrdering numbers from least to greatest (up to 1000)\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style skip counting and place value mystery activity\u003c\/li\u003e\n  \u003cli\u003eDiner-themed mystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eSkip counting, base ten, comparing, and ordering clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBack-to-school and end-of-year math review\u003c\/li\u003e\n  \u003cli\u003ePlace value and number sense practice\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52324057842034,"sku":"8540606","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/CSIMathMysteryNumberandPlaceValue1.webp?v=1750112933"},{"product_id":"summer-csi-math-mystery-addition-subtraction-worksheets","title":"Summer Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–5 | Who Stole Summer?","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn summer addition and subtraction review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eSummer Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grade 3)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Subtraction from 100, 3-digit addition with regrouping, multi-digit addition and subtraction, and word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 28 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt has been the best summer ever — beach trips, vacations, long sunny days with friends. Then one morning your students wake up and summer is simply gone. No sunshine, no warm breeze, no explanation. Someone has stolen summer, and it is up to your class to get it back before it disappears for good.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues — including word problems — to gather evidence and rule each suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the summer thief remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and bring summer back before it is gone forever? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSubtraction from 100 (2-digit numbers)\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003e3-digit addition and subtraction\u003c\/li\u003e\n  \u003cli\u003eMulti-digit addition\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction word problems\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style summer addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eStory page and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets and word problems\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSummer and back-to-school math activities\u003c\/li\u003e\n  \u003cli\u003eSummer school and end-of-year review\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups and homeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52324094640498,"sku":"8372297","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/SummerAdditionandSubtractionCSIMathMystery1.webp?v=1750114800"},{"product_id":"summer-addition-subtraction-csi-math-mystery-worksheets","title":"Summer Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–5 | The Missing Skates","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn summer addition and subtraction review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eSummer Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 2–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Subtraction from 100, 3-digit addition with regrouping, multi-digit add\/subtract, word problems, and a coordinate grid\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 27 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is the perfect summer day for a trip to the roller rink — except for one problem. Your skates have vanished. You remember lending them to a friend, but you cannot recall which one. The outing is about to start, and the clock is ticking.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of addition and subtraction clues — including word problems and a coordinate-grid activity — to gather evidence and rule each friend out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the friend who borrowed the skates remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and track down the missing skates in time to hit the rink? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSubtraction from 100 (2-digit numbers)\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eMulti-digit addition and subtraction\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction word problems\u003c\/li\u003e\n  \u003cli\u003eA coordinate grid activity\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style summer addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eStory page and suspect list\u003c\/li\u003e\n  \u003cli\u003eMath clue worksheets, word problems, and a coordinate-grid activity\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSummer school and summer math review\u003c\/li\u003e\n  \u003cli\u003eBack-to-school math activities\u003c\/li\u003e\n  \u003cli\u003eEnd-of-year review and early finishers\u003c\/li\u003e\n  \u003cli\u003eMath centers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52324294689138,"sku":"8336949","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/SummerCSIMathMysteryAdditionandSubtraction1.webp?v=1750123400"},{"product_id":"3-digit-addition-subtraction-csi-math-mystery-haunted-hallway","title":"3-Digit Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–5 | The Haunted Hallway","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn 3-digit addition and subtraction review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003e3-Digit Addition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 2–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e 3-digit addition and subtraction with regrouping, including a maze and puzzle pages\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 19 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eStrange things are happening in the school hallway. Items keep disappearing from the lockers, the lights flicker, and there are odd noises after the bell rings — almost like a ghost. The teachers are stumped, so it is up to your students to investigate the Haunted Hallway.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of 3-digit addition and subtraction clues — worksheets, a maze, and puzzles — to gather evidence. Each correct answer helps them rule a locker out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of suspects shrinks until only the guilty locker remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and solve the mystery of the Haunted Hallway? Sharpen those pencils and find out who — or what — is behind it.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003e3-digit subtraction with regrouping\u003c\/li\u003e\n  \u003cli\u003eA subtraction regrouping maze\u003c\/li\u003e\n  \u003cli\u003eAn addition regrouping puzzle\u003c\/li\u003e\n  \u003cli\u003eAdding multiple 3-digit numbers to find a final sum\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style 3-digit addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003ePrintable mystery story and suspect roster\u003c\/li\u003e\n  \u003cli\u003e5 math clue pages (worksheets, maze, puzzle)\u003c\/li\u003e\n  \u003cli\u003eTeacher directions, answer key, and optional daily-clue pacing guide\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHalloween and fall math review\u003c\/li\u003e\n  \u003cli\u003e3-digit addition and subtraction regrouping practice\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52334803911026,"sku":"7296432","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/HalloweenMath1.webp?v=1750284667"},{"product_id":"adding-subtracting-integers-csi-math-mystery-monster-mummies","title":"Adding \u0026 Subtracting Integers CSI Math Mystery Worksheets | Grades 5–9 | Monster Mummy","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eAn archaeological dig has unearthed something that should have stayed buried — a Monster Mummy is on the loose, and only integer clues can identify it. This printable \u003cstrong\u003eAdding \u0026amp; Subtracting Integers CSI Math Mystery\u003c\/strong\u003e turns integer practice into a detective investigation, built for \u003cstrong\u003eGrades 5–9 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with integer operations and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 5–9 (best for Grade 7)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Adding and subtracting integers (including subtracting negatives) and integer word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 31 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eDeep inside a newly opened tomb, an archaeological dig has uncovered something it should have left buried. A Monster Mummy is on the loose, and the only way to identify it is to work through the clues left behind in the dust. Your students are the investigators on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve integer clues — adding and subtracting positive and negative numbers, including word problems and a maze — to gather evidence. Each correct answer helps them rule a suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only one Monster Mummy remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the integers and unmask the Monster Mummy before the trail goes cold? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdding positive and negative integers\u003c\/li\u003e\n  \u003cli\u003eSubtracting integers (including subtracting negatives)\u003c\/li\u003e\n  \u003cli\u003eInteger word problems for real-world reasoning\u003c\/li\u003e\n  \u003cli\u003eA maze and puzzle pages for integer fluency\u003c\/li\u003e\n  \u003cli\u003eMixed integer operations in a final multi-step challenge\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style integer mystery activity with storyline and suspect roster\u003c\/li\u003e\n  \u003cli\u003e5 integer clue pages (worksheet, maze, puzzle, word problems, final challenge)\u003c\/li\u003e\n  \u003cli\u003eTeacher directions, pacing guide, and answer key\u003c\/li\u003e\n  \u003cli\u003eColor and black-and-white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHalloween and fall math review\u003c\/li\u003e\n  \u003cli\u003eInteger operations practice and test prep\u003c\/li\u003e\n  \u003cli\u003eMiddle school RTI or intervention\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52334869676402,"sku":"6955229","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/AddingandSubtractingIntegersCSIMathMysteryWorksheets1.webp?v=1750290306"},{"product_id":"csi-math-mystery-3-digit-addition-multiplication-division-2nd-4th-grade","title":"Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–5 | The Missing Stationery","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn back-to-school math review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eAddition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, multiplication and division facts, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 3–5)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e 3-digit addition with regrouping, subtraction from 100, and multiplication \u0026amp; division facts\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 27 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is the start of a new school year, and the supply cupboard should be full — but something is wrong. The school's stationery has vanished. The pencils, the markers, the glue sticks — all gone. Class can't run without supplies, and it is up to your students to find out who took them.\u003c\/p\u003e\n\u003cp\u003eAs junior math detectives, students work through five clues, solving 3-digit addition, subtraction, and multiplication and division fact problems to gather evidence. Each correct answer helps them rule a suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the stationery thief remains.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and recover the supplies before class falls apart? Sharpen those pencils — while you still have them — and solve the case of the Missing Stationery.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdding single digits to 3-digit numbers with regrouping\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eSubtracting 2-digit numbers from 100\u003c\/li\u003e\n  \u003cli\u003eMultiplication facts 0–12\u003c\/li\u003e\n  \u003cli\u003eDivision facts up to 144\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style addition and subtraction math mystery activity\u003c\/li\u003e\n  \u003cli\u003ePrintable case file and mystery story\u003c\/li\u003e\n  \u003cli\u003e5 math clue pages\u003c\/li\u003e\n  \u003cli\u003eSuspect elimination worksheet\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBack-to-school math activities\u003c\/li\u003e\n  \u003cli\u003eAddition, subtraction, and fact-fluency review\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52335128248690,"sku":"5799886","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/3rdGradeCSIMathMysteryWorksheetsAdditionandSubtraction1.webp?v=1750303529"},{"product_id":"addition-subtraction-multiplication-csi-math-mystery-presidents-day","title":"Presidents Day CSI Math Mystery Worksheets | Grades 2–5 | The Missing Hat","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn Presidents Day math review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003ePresidents Day CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, multiplication, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Addition (with regrouping), subtraction from 100, and single-digit multiplication (including multiples of 10)\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 15 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is Presidents Day, and President Lincoln is dressed and ready for his big speech — except for one thing. His lucky stovepipe hat has vanished from the hallway table. The speech is about to start, and the hat is nowhere to be found. Someone took it, and your students are on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve a series of math clues — addition, subtraction, and multiplication — to gather evidence and rule suspects out one at a time.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks until only the hat thief is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and find the missing hat before the speech begins? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdding single digits to 3-digit numbers\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eSubtracting 2-digit numbers from 100\u003c\/li\u003e\n  \u003cli\u003eSingle-digit multiplication\u003c\/li\u003e\n  \u003cli\u003eMultiplying tens (e.g., 30 × 9)\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style Presidents Day math mystery activity\u003c\/li\u003e\n  \u003cli\u003eFull printable mystery story\u003c\/li\u003e\n  \u003cli\u003e5 math clue pages\u003c\/li\u003e\n  \u003cli\u003eSuspect elimination worksheet\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePresidents Day and February math activities\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n  \u003cli\u003eSpiral review throughout the year\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52346750501234,"sku":"5246705","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/PresidentsDayCSIMathMystery1.webp?v=1750976566"},{"product_id":"area-perimeter-csi-math-mystery-may-4th","title":"Area \u0026 Perimeter CSI Math Mystery Worksheets | Grades 3–6 | Geometry Wars","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eA Mathematical Key has gone missing in a galaxy not so far away, and only area and perimeter skills can recover it. This printable \u003cstrong\u003eArea \u0026amp; Perimeter CSI Math Mystery\u003c\/strong\u003e turns geometry review into a detective investigation, built for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with area, perimeter, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Area, perimeter, missing side lengths, and measurement word problems (U.S. customary units)\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 22 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIn a galaxy not so far away, your students are training to become masters of shapes and spaces. But there is a problem: a powerful Mathematical Key has gone missing, and only a true geometry hero can recover it. The clues are scattered, the suspects are many, and the mission is theirs.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve area and perimeter puzzles — finding areas, perimeters, and missing side lengths — to gather evidence and rule suspects out one by one.\u003c\/p\u003e\n\u003cp\u003eWith every solved puzzle, the suspect list shrinks until only the one holding the Key remains.\u003c\/p\u003e\n\u003cp\u003eCan your students feel the force of geometry and recover the Mathematical Key? Sharpen those pencils and crack the Geometry Wars case — perfect for May the 4th or any time of year.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eArea of rectangles and quadrilaterals\u003c\/li\u003e\n  \u003cli\u003ePerimeter of various shapes\u003c\/li\u003e\n  \u003cli\u003eSolving for missing side lengths\u003c\/li\u003e\n  \u003cli\u003eA geometry-based maze puzzle\u003c\/li\u003e\n  \u003cli\u003eWord problems using U.S. customary units (inches, feet, yards)\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style area and perimeter mystery activity\u003c\/li\u003e\n  \u003cli\u003ePrintable case file and suspect list\u003c\/li\u003e\n  \u003cli\u003eAll puzzle clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMay the 4th and space-themed math days\u003c\/li\u003e\n  \u003cli\u003eArea and perimeter review and test prep\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math and end-of-year geometry review\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52346907328882,"sku":"5149806","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/AreaandPerimeterCSIMathMystery1.webp?v=1750985576"},{"product_id":"valentines-day-csi-math-mystery-grades-3-5","title":"Valentine’s Day CSI Math Mystery Worksheets | Grades 2–5 | Love Bug Wizard","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn February math review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003eValentine’s Day CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, multiplication, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Addition with regrouping, subtraction from 100, and multiplication (multiples of 10 and facts)\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 15 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is Valentine's Day, and the school is buzzing with kindness and excitement — until something very strange starts happening. A mysterious wizard was spotted at the school gate, muttering spells. Now brightly colored love bugs are flitting through the hallways. Could they be enchanted students?\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, your students solve a series of math puzzles to gather evidence and work out which suspect is really the Love Bug Wizard. Each correct answer helps them rule a suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks — one name cleared here, another there — until only the true wizard behind the spell is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues, unmask the wizard, and reverse the spell before the whole school is bugged? Sharpen those pencils and solve the Love Bug mystery.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eAdding multiple addends\u003c\/li\u003e\n  \u003cli\u003e2-digit subtraction from 100\u003c\/li\u003e\n  \u003cli\u003eMultiplying multiples of 10 (e.g., 30 × 9)\u003c\/li\u003e\n  \u003cli\u003eMultiplication facts (maze)\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style Valentine’s Day math mystery activity\u003c\/li\u003e\n  \u003cli\u003eMath puzzle clue worksheets\u003c\/li\u003e\n  \u003cli\u003eSuspect elimination chart\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eValentine’s Day and February math activities\u003c\/li\u003e\n  \u003cli\u003eHoliday math centers and partner work\u003c\/li\u003e\n  \u003cli\u003eSpiral review and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52347043217778,"sku":"5146409","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/ValentinesDayMathMystery1.webp?v=1750992458"},{"product_id":"christmas-csi-math-mystery-grades-2-5","title":"Christmas CSI Math Mystery Worksheets | Grades 2–5 | Who Stole the Sleigh?","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eSanta's sleigh has vanished from the North Pole on the night it is needed most, and only your students can track it down. This printable \u003cstrong\u003eChristmas CSI Math Mystery\u003c\/strong\u003e turns December math review into a detective investigation, built for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, multiplication, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Addition and subtraction (with regrouping), single-digit multiplication, and coordinate mapping\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 15 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eIt is almost Christmas at the North Pole, and Santa and his elves have worked all year to get ready. The presents are wrapped, the reindeer are fed — and then disaster strikes. Santa's sleigh has vanished. Without it, there will be no deliveries and no Christmas. All that is left behind are five clues.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, your students work those clues one at a time, solving addition, subtraction, multiplication, and coordinate-mapping puzzles to gather evidence. Each correct answer helps them rule a suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved puzzle, the suspect list shrinks — one name cleared here, another there — until only the culprit who took the sleigh is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and recover the sleigh in time to save Christmas? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e2-digit and 3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eSubtraction from 100\u003c\/li\u003e\n  \u003cli\u003eSingle-digit multiplication\u003c\/li\u003e\n  \u003cli\u003eMapping coordinates on two axes\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style Christmas math mystery activity\u003c\/li\u003e\n  \u003cli\u003e5 math puzzle clue pages\u003c\/li\u003e\n  \u003cli\u003eSuspect elimination chart\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eChristmas and December math activities\u003c\/li\u003e\n  \u003cli\u003eHoliday math centers and class parties\u003c\/li\u003e\n  \u003cli\u003eSpiral review and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool holiday lessons\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52347057078642,"sku":"5070687","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/ChristmasMathMystery1.webp?v=1750993520"},{"product_id":"thanksgiving-csi-math-mystery-grades-2-5","title":"Thanksgiving CSI Math Mystery Worksheets | Grades 2–5 | The Missing Turkey","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eThe day before Thanksgiving, the turkey vanishes — and your students are the only inspectors who can crack the case. This printable \u003cstrong\u003eThanksgiving CSI Math Mystery\u003c\/strong\u003e turns math review into a detective investigation, built for \u003cstrong\u003eGrades 2–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with addition, subtraction, multiplication, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–5 (best for Grade 3)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Addition and subtraction (with regrouping), multiplication facts, and coordinate mapping\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 16 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eThanksgiving is almost here and the fridge is packed — except for one very important item. The turkey is gone. It is not in the fridge, not on the counter, not anywhere in the kitchen. Someone has taken it, and your students have been called in as the math inspectors on the case.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students work through five clues, solving addition, subtraction, multiplication, and coordinate-mapping puzzles to gather evidence. Each correct answer helps them rule a suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect list shrinks — one name cleared here, another there — until only the turkey thief is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and recover the turkey before Thanksgiving dinner is ruined? Sharpen those pencils and solve the case of the Missing Turkey.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSingle- and double-digit addition\u003c\/li\u003e\n  \u003cli\u003e2-digit addition and subtraction with regrouping\u003c\/li\u003e\n  \u003cli\u003eMultiplication facts (maze)\u003c\/li\u003e\n  \u003cli\u003eCoordinate mapping on an axis\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style Thanksgiving math mystery activity\u003c\/li\u003e\n  \u003cli\u003e5 mixed-operation puzzle clue pages\u003c\/li\u003e\n  \u003cli\u003ePrintable suspect list and clue sheets\u003c\/li\u003e\n  \u003cli\u003eBonus color-in page for early finishers\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThanksgiving and fall math activities\u003c\/li\u003e\n  \u003cli\u003eMixed math review and spiral review\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher and holiday sub plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52522795565426,"sku":"5003849","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/Thanksgiving1_525fad61-6fd1-4a24-bb92-ccd00090e1de.webp?v=1753655720"},{"product_id":"adding-subtracting-integers-csi-math-mystery-zombie","title":"Adding \u0026 Subtracting Integers CSI Math Mystery Worksheets | Grades 6–9 | Zombie Outbreak","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eThe zombie apocalypse has begun, and the only way to stop it is to find patient zero — hidden behind a series of integer clues. This printable \u003cstrong\u003eAdding \u0026amp; Subtracting Integers CSI Math Mystery\u003c\/strong\u003e turns integer practice into a detective investigation, built for \u003cstrong\u003eGrades 6–9 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with integer operations and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 6–9 (best for Grade 7)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Adding and subtracting integers (positive and negative numbers), including word problems\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 16 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eThe zombie apocalypse has begun, and your school is in ruins. Somewhere out there is patient zero — the very first infected zombie, the source of the entire outbreak. Find them, and there is still a chance to stop it. Your students are the ones being sent in.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students work through five integer clues, adding and subtracting positive and negative numbers to gather evidence. Each correct answer helps them rule a suspect out and edge closer to the zombie leader.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of suspects shrinks — one name cleared here, another there — until only the first infected zombie is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators solve all five clues and stop the outbreak before it is too late? Sharpen those pencils and crack the Zombie Outbreak case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdding integers (positive and negative)\u003c\/li\u003e\n  \u003cli\u003eSubtracting integers with mixed signs\u003c\/li\u003e\n  \u003cli\u003eApplying integer operations in word problems\u003c\/li\u003e\n  \u003cli\u003eReasoning with positive and negative numbers\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style integer mystery activity\u003c\/li\u003e\n  \u003cli\u003e5 integer-based puzzle clue pages\u003c\/li\u003e\n  \u003cli\u003eSuspect elimination worksheet\u003c\/li\u003e\n  \u003cli\u003ePrintable student pages and clue sheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHalloween or fall math review\u003c\/li\u003e\n  \u003cli\u003eInteger operations practice and review\u003c\/li\u003e\n  \u003cli\u003eMiddle school RTI or intervention\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups and independent work\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52522822730098,"sku":"4908270","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/MathMysteryRunZombieRun1.webp?v=1753656722"},{"product_id":"place-value-skip-counting-csi-math-mystery","title":"Place Value \u0026 Skip Counting CSI Math Mystery Worksheets | Grades 2–4 | The Playground Bandit","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn place value and skip counting review into a detective investigation your students won't want to put down. This printable \u003cstrong\u003ePlace Value \u0026amp; Skip Counting CSI Math Mystery\u003c\/strong\u003e is designed for \u003cstrong\u003eGrades 2–4 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with place value, skip counting, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–4\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Place value to 1000, number forms, 10 more \/ 10 less, skip counting by 2s, 5s, and 10s\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 16 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eSomething has gone very wrong on the school playground. The seesaw is working backwards. The hopscotch numbers are all scrambled. And suddenly no one can skip count anymore. There's a Place Value Bandit on the loose — and recess is in serious danger.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, your students work the clues one by one, solving place value and skip counting puzzles to figure out who has been tampering with the math. Each correct answer is a piece of evidence that helps them rule a suspect out.\u003c\/p\u003e\n\u003cp\u003eWith every solved puzzle, the suspect list shrinks — one name cleared here, another there — until only the real Playground Bandit is left.\u003c\/p\u003e\n\u003cp\u003eCan your class crack the clues and restore order before recess is ruined for good? Sharpen those pencils and catch the Playground Bandit.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePlace value to 1000\u003c\/li\u003e\n  \u003cli\u003eStandard, word, and expanded form\u003c\/li\u003e\n  \u003cli\u003e10 more \/ 10 less\u003c\/li\u003e\n  \u003cli\u003eSkip counting by 2s, 5s, and 10s\u003c\/li\u003e\n  \u003cli\u003eGreater than \/ less than and addition \u0026amp; subtraction to 1000\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style place value and skip counting mystery activity\u003c\/li\u003e\n  \u003cli\u003e5 story-driven puzzle clue pages\u003c\/li\u003e\n  \u003cli\u003ePrintable suspect list and student pages\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBack-to-school math review\u003c\/li\u003e\n  \u003cli\u003ePlace value and skip counting practice\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n  \u003cli\u003eAnytime spiral review\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":52522855334258,"sku":"4858413","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/CSI-Math-Mystery-place-value-1.webp?v=1753657958"},{"product_id":"multiplication-division-csi-math-mystery-zombie-cure","title":"Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–7 | The Zombie Cure","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eA zombie outbreak is spreading fast, and only one cure can stop it — but it's hidden behind a string of multiplication and division clues. This printable \u003cstrong\u003eMultiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e turns fact practice into a race-against-the-clock investigation, built for \u003cstrong\u003eGrades 3–7 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to rule out the wrong cures, and race to crack the case — all while getting meaningful practice with multiplication and division and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–7 (best for Grades 4–5)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts up to 12 × 12\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 32 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eA zombie outbreak has swept through town, and the race is on to stop it. Scientists have rushed several possible cures into the lab — but only one of them actually works. Choose the wrong one, and the outbreak keeps spreading. That is where your students come in.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students open \"The Cures\" evidence file, where every possible cure is described by its form, color, strength level, dosage, and batch. The catch: the clues do not hand over the answer. Students have to solve multiplication and division problems to unlock each clue, then use the results to cross the wrong cures off the list one at a time.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the suspect pool shrinks. One cure is eliminated here, another there, until a single possibility is left standing. Students follow the evidence, check their reasoning, and zero in on the one correct formula.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the case before the outbreak spreads? Sharpen those pencils, work the clues, and discover the real Zombie Cure.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts up to 12 × 12\u003c\/li\u003e\n  \u003cli\u003eDivision facts connected to those multiplication facts\u003c\/li\u003e\n  \u003cli\u003eBasic operations review and fluency\u003c\/li\u003e\n  \u003cli\u003eReading clues and eliminating incorrect options\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eMultiple clue-based worksheets\u003c\/li\u003e\n  \u003cli\u003e\"The Cures\" evidence chart and cure-elimination checklist\u003c\/li\u003e\n  \u003cli\u003eClear student instructions\u003c\/li\u003e\n  \u003cli\u003eAnswer keys for all activities\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBack-to-school math activities\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups and independent work\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n  \u003cli\u003eEnd-of-unit and end-of-year review\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division practice and reinforcement\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61937765024114,"sku":"15411675","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/multiplication-division-csi-math-mystery-zombie-cure-cover.jpg?v=1781469296"},{"product_id":"multiplication-division-csi-math-mystery-worksheets-grades-4-6-halloween-school-witch","title":"Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 4–6 | Halloween School Witch","description":"\u003cp\u003eNeed a no-prep way to review multiplication and division basic facts? This \u003cstrong\u003eMultiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e gives \u003cstrong\u003e4th, 5th, and 6th grade\u003c\/strong\u003e students a fun Halloween-themed way to practice key math skills while solving the \u003cstrong\u003eSchool Witch\u003c\/strong\u003e case.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through clue pages, solve multiplication and division problems, and use their answers to eliminate suspects. It feels like a detective investigation, but still gives students focused practice with basic facts, 4-digit addition with regrouping, and rounding numbers.\u003c\/p\u003e\n\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e 4th, 5th, and 6th grade (also great for advanced 3rd graders or struggling 6th graders)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 16 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication, division, 4-digit addition with regrouping, rounding, and problem solving\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eEveryone knows that your school is haunted by witches. Weird things have been happening lately — lost pens, broken rulers, messy books, missing whiteboard markers, and worst of all, wrong maths on the board. It could only be the witches. Students must solve the clues to discover which mischievous witch is responsible!\u003c\/p\u003e\n\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts up to 12\u003c\/li\u003e\n  \u003cli\u003eDivision facts up to 12\u003c\/li\u003e\n  \u003cli\u003e4-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eRecall of basic addition and subtraction facts\u003c\/li\u003e\n  \u003cli\u003eRounding numbers to the nearest 10, 100, and 1000\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eCareful calculation and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style math mystery activity\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division clue pages\u003c\/li\u003e\n  \u003cli\u003eSuspect elimination activity\u003c\/li\u003e\n  \u003cli\u003eAnswer key included\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable Halloween CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHalloween math activities\u003c\/li\u003e\n  \u003cli\u003eBack-to-school and end-of-year review\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups and independent work\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division fact review\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow CSI Math Mysteries Work\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRead the Case\u003c\/strong\u003e – Students begin with a short mystery scenario and find out what needs to be solved.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSolve the Clues\u003c\/strong\u003e – Each clue gives students focused math practice using the target skill.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEliminate Suspects\u003c\/strong\u003e – Students use their answers to remove suspects from the investigation one clue at a time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCrack the Case\u003c\/strong\u003e – By the end, only one suspect remains and students reveal the answer to the mystery.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eNo apps, locks, passwords, or student logins required. Just print and go.\u003c\/p\u003e\n\n\u003ch3\u003ePlease Note\u003c\/h3\u003e\n\u003cp\u003eThis is a printable PDF resource. No physical item will be shipped.\u003c\/p\u003e\n\n\u003ch3\u003eDownloadable Resource\u003c\/h3\u003e\n\u003cp\u003eAll of our products are \u003cstrong\u003edigital downloads\u003c\/strong\u003e — no physical items will be shipped.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAfter purchase, you'll receive an email with a \u003cstrong\u003edownload link\u003c\/strong\u003e within minutes.\u003c\/li\u003e\n  \u003cli\u003eMake sure to check your \u003cstrong\u003espam or promotions folder\u003c\/strong\u003e if you don't see it right away.\u003c\/li\u003e\n  \u003cli\u003eIf you experience any issues accessing your files, please \u003ca href=\"mailto:stuart@kiwilandeducation.com\"\u003econtact us\u003c\/a\u003e and we'll help you promptly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eOur Guarantee\u003c\/h3\u003e\n\u003cp\u003eDue to the nature of digital products, \u003cstrong\u003eall sales are final\u003c\/strong\u003e. We do not offer refunds or exchanges once a file has been downloaded. However, if you encounter any problems with your download or the product itself, please reach out — we're happy to assist.\u003c\/p\u003e\n\u003cp\u003eThank you from Kiwiland Education\u003c\/p\u003e","brand":"Kiwiland Education","offers":[{"title":"Default","offer_id":61945223971186,"sku":"4844674","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/halloween-csi-math-mystery-multiplication-division-grades-4-6.jpg?v=1781644258"},{"product_id":"multiplication-division-csi-math-mystery-worksheets-grades-4-6-the-mad-kings-spy","title":"Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 4–6 | The Mad King's Spy","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eA spy has slipped into the King's court, and the kingdom's secrets are no longer safe — only the sharpest math detectives can unmask them. This printable \u003cstrong\u003eMultiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e turns fact-fluency review into a detective investigation, built for \u003cstrong\u003eGrades 4–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with multiplication and division facts and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 4–6 (best for Grades 4–5)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts (times tables 0–12) and 4-digit addition with regrouping\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 16 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eThe Mad King is convinced there is a spy in his castle — someone leaking his secrets to the enemy. He has rounded up a list of suspects, but he cannot work out which one is the traitor. So he has called in your students, the finest math detectives in the land.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication and division fact clues to gather evidence and rule each suspect out, one by one.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of suspects shrinks until only the King's spy is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and unmask the Mad King's Spy? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts (times tables 0–12)\u003c\/li\u003e\n  \u003cli\u003eDivision facts 1–12\u003c\/li\u003e\n  \u003cli\u003e4-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction basic-fact practice\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication and division fact-fluency review\u003c\/li\u003e\n  \u003cli\u003eBack-to-school or end-of-year math review\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951124701554,"sku":"4822505","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/multiplication-division-csi-math-mystery-grades-4-6-mad-kings-spy.jpg?v=1781737099"},{"product_id":"multiplication-division-csi-math-mystery-worksheets-grades-3-5-space-moon-mission","title":"Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–5 | Space Moon Mission","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTransform multiplication and division review into a space detective mission your students will beg to finish. In this printable \u003cstrong\u003eMultiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e, students take command as Moon Mission Leader and solve math clues to navigate a mysterious moon base — built for \u003cstrong\u003eGrades 3–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to rule out rooms, and race to uncover the secret base leader — all while getting meaningful practice with multiplication and division facts, coordinate mapping, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–5 (best for Grade 3; works for struggling Grade 6)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts, multiplying by multiples of 10, coordinate mapping, and addition with regrouping\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 16 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, STEM and space units, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eA secret base has been discovered on the moon. Nobody knows how it got there, whose base it is, or what secrets are hidden inside — and every astronaut sent before has vanished without a trace.\u003c\/p\u003e\n\u003cp\u003eNow your students take command as the new Moon Mission Leader. Their job: work through the base's hidden passageways and deadly traps by solving math clues, ruling out one room at a time.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of rooms shrinks until only one is left — the hideout of the secret base leader.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and locate the leader of the moon base? Sharpen those pencils and start the mission.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts and multiplying by multiples of 10 (such as 5 × 60)\u003c\/li\u003e\n  \u003cli\u003eDivision facts with a code and key\u003c\/li\u003e\n  \u003cli\u003eCoordinate mapping and graphing\u003c\/li\u003e\n  \u003cli\u003eA multiplication maze\u003c\/li\u003e\n  \u003cli\u003eAddition of single- and double-digit numbers with regrouping\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style space math mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and room list\u003c\/li\u003e\n  \u003cli\u003eMultiplication, division, mapping, and maze clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication and division facts review\u003c\/li\u003e\n  \u003cli\u003eSpace, STEM, and moon-landing units\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951183585650,"sku":"4571840","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/multiplication-division-csi-math-mystery-grades-3-5-space-moon-mission_f2e27a9b-5dd3-497b-9e3e-de2277067642.jpg?v=1781738222"},{"product_id":"multiplication-division-csi-math-mystery-worksheets-grades-3-5-zombie-attack","title":"Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–5 | Zombie Attack","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eA zombie outbreak has hit the school, and the only way to stay one step ahead is to solve the math. This printable \u003cstrong\u003eMultiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e turns fact review into a detective investigation, built for \u003cstrong\u003eGrades 3–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to cross suspects off the list, and race to crack the case — all while getting meaningful practice with multiplication and division facts, rounding, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–5 (best for Grades 3–4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplying by multiples of 10, division facts, 3-digit addition with regrouping, and rounding to the nearest 10\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 15 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, test-prep review, small groups, Halloween, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eA zombie attack has broken out, and a list of suspects is all your students have to go on. Someone — or something — is behind it, and only the sharpest math detectives can work out who.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication, division, and rounding clues to gather evidence and rule each suspect out, one by one.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of suspects shrinks until only one is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues before the zombies close in? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplying one-digit numbers by multiples of 10 (10–90)\u003c\/li\u003e\n  \u003cli\u003eDivision facts up to 10\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eRounding to the nearest 10\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMultiplication, division, addition, and rounding clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication and division facts review\u003c\/li\u003e\n  \u003cli\u003eHalloween and back-to-school math\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951199117682,"sku":"3799849","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/multiplication-division-csi-math-mystery-grades-3-5-zombie-attack_f2681543-3d32-49f9-893f-766f10adc0e7.jpg?v=1781740781"},{"product_id":"multiplication-division-csi-math-mystery-worksheets-grades-3-5-alien-invasion","title":"Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–5 | Alien Invasion","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eTurn multiplication and division review into an alien-invasion investigation your students will race to finish. This printable \u003cstrong\u003eMultiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e wraps fact practice in a detective case, built for \u003cstrong\u003eGrades 3–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to cross suspects off the list, and race to crack the case — all while getting meaningful practice with multiplication and division facts, rounding, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–5 (best for Grade 4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplying by multiples of 10, multiplication and division facts to 10, 3-digit addition with regrouping, and rounding to the nearest 10\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 15 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, test-prep review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eAliens have landed, and a list of suspects is all your students have to go on. Only the sharpest math detectives can work out who is really behind the invasion.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication, division, and rounding clues to gather evidence and rule each suspect out, one by one.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of suspects shrinks until only one is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and unmask the culprit? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplying one-digit numbers by multiples of 10 (10–90)\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division facts up to 10\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction with 10s, 100s, and 1000s\u003c\/li\u003e\n  \u003cli\u003e3-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eRounding to the nearest 10\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMultiplication, division, addition, and rounding clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication and division facts review\u003c\/li\u003e\n  \u003cli\u003eBack-to-school and end-of-year math\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951204786546,"sku":"3789957","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/alien-invasion-csi-math-mystery-multiplication-division-grades-3-5.jpg?v=1781741520"},{"product_id":"addition-subtraction-csi-math-mystery-worksheets-grades-2-3-alien-invasion","title":"Addition \u0026 Subtraction CSI Math Mystery Worksheets | Grades 2–3 | Alien Invasion","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eMake addition and subtraction review feel like a case worth cracking. This printable \u003cstrong\u003eAddition \u0026amp; Subtraction CSI Math Mystery\u003c\/strong\u003e wraps early math practice in an alien-invasion investigation, built for \u003cstrong\u003eGrades 2–3 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to cross suspects off the list, and race to crack the case — all while getting meaningful practice with addition and subtraction, regrouping, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–3 (best for Grades 2–3)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF (color and black \u0026amp; white versions included)\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Addition within 20, two-digit addition with regrouping, single-digit addition and subtraction, making 20, and rounding to the nearest 10\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 26 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eAliens have landed and the school principal has been abducted! A list of alien suspects is all your students have to go on, and only the sharpest math detectives can work out which one is responsible.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve addition and subtraction clues to gather evidence and rule each suspect out, one by one.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of suspects shrinks until only one alien is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and rescue the principal? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAddition within 20 and making 20\u003c\/li\u003e\n  \u003cli\u003eSingle-digit addition and subtraction\u003c\/li\u003e\n  \u003cli\u003eTwo-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003eRounding to the nearest 10\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style addition and subtraction mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003eColor and black \u0026amp; white versions\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAddition and subtraction review\u003c\/li\u003e\n  \u003cli\u003eBack-to-school and end-of-year math\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951206228338,"sku":"3807824","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/alien-invasion-csi-math-mystery-addition-subtraction-grades-2-3.jpg?v=1781741726"},{"product_id":"multiplication-division-csi-math-mystery-worksheets-grades-3-5-mission-to-mars","title":"Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–5 | Mission to Mars","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eBring multiplication and division review to life with a mission to Mars your students won't want to put down. This printable \u003cstrong\u003eMultiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e wraps fact practice in a space investigation, built for \u003cstrong\u003eGrades 3–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to rule out rooms, and race to find their way out — all while getting meaningful practice with multiplication and division facts, directions, and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–5\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts, multiplying by multiples of 10, and following directions on a map\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 16 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, STEM and space units, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eThe Mars Space Agency has sent a team of astronauts to set up a base on Mars — and your students are the mission's Team Leader, responsible for keeping everyone safe.\u003c\/p\u003e\n\u003cp\u003eOne week in, the team discovers a mysterious structure full of passageways, strange rooms, and hidden traps. The moment they step inside, the doors slam shut behind them.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication and division clues to rule out each room, one by one, until only the location of the exit is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and escape the Martian structure? Sharpen those pencils and start the mission.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication and division facts\u003c\/li\u003e\n  \u003cli\u003eMultiplying by multiples of 10\u003c\/li\u003e\n  \u003cli\u003eFollowing directions on a map\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate rooms\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style space math mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and room list\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication and division facts review\u003c\/li\u003e\n  \u003cli\u003eSpace, STEM, and Mars units\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951207702898,"sku":"4700595","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/multiplication-division-csi-math-mystery-mission-to-mars-grades-3-5.jpg?v=1781741929"},{"product_id":"addition-subtraction-within-100-csi-math-mystery-worksheets-grades-2-3-space-mission","title":"Addition \u0026 Subtraction Within 100 CSI Math Mystery Worksheets | Grades 2–3 | Space Mission","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eSwap dull addition and subtraction review for a space mission your students will race to finish. This printable \u003cstrong\u003eAddition \u0026amp; Subtraction Within 100 CSI Math Mystery\u003c\/strong\u003e wraps fact practice in a space investigation, built for \u003cstrong\u003eGrades 2–3 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to cross suspects off the list, and race to crack the case — all while getting meaningful practice with addition and subtraction within 100 and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–3\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Addition and subtraction within 100\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e No-prep printable PDF including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Math centers, sub plans, early finishers, review, small groups, STEM and space units, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eSomething has gone wrong aboard the space mission, and the crew needs answers fast. A list of suspects is all your students have to go on, and only the sharpest math detectives can work out who is responsible.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve addition and subtraction clues to gather evidence and rule each suspect out, one by one.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of suspects shrinks until only one is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and solve the case before the mission is over? Sharpen those pencils and get started.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAddition within 100\u003c\/li\u003e\n  \u003cli\u003eSubtraction within 100\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style space math mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eAddition and subtraction within 100 clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAddition and subtraction within 100 review\u003c\/li\u003e\n  \u003cli\u003eSpace, STEM, and back-to-school math\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951208882546,"sku":"4735817","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/addition-subtraction-within-100-csi-math-mystery-space-mission-grades-2-3.jpg?v=1781742136"},{"product_id":"multiplication-division-csi-math-mystery-worksheets-grades-3-6-the-missing-teacher","title":"Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–6 | The Missing Teacher","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eA teacher has gone missing, and the only trail of clues is made of math. This printable \u003cstrong\u003eMultiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e turns fact review into a detective investigation, built for \u003cstrong\u003eGrades 3–6 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to cross suspects off the list, and race to crack the case — all while getting meaningful practice with multiplication and division facts and problem solving. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–6\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts up to the 12 times tables\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 15 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Back-to-school, end-of-year, math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eA teacher has vanished, and your students are the only detectives who can crack the case. A list of suspects is all they have to go on.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication and division clues to gather evidence and rule each suspect out, one by one.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of suspects shrinks until only one is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and find the missing teacher? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts up to the 12 times tables\u003c\/li\u003e\n  \u003cli\u003eDivision facts up to the 12 times tables\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication and division facts review\u003c\/li\u003e\n  \u003cli\u003eBack-to-school and end-of-year math\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951261835634,"sku":"3627047","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/multiplication-division-csi-math-mystery-the-missing-teacher-grades-3-6.jpg?v=1781747726"},{"product_id":"multiplication-division-csi-math-mystery-worksheets-grades-3-5-zombie-raid","title":"Multiplication \u0026 Division CSI Math Mystery Worksheets | Grades 3–5 | Zombie Raid","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eWrap multiplication and division review in a zombie-raid mystery your students will race to finish. This printable \u003cstrong\u003eMultiplication \u0026amp; Division CSI Math Mystery\u003c\/strong\u003e turns fact review into a detective investigation, built for \u003cstrong\u003eGrades 3–5 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to cross suspects off the list, and race to crack the case — all while getting meaningful practice with multiplication, division, and multi-digit addition and subtraction. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 3–5 (best for Grade 4)\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e Multiplication and division facts to 12, and 4-digit addition and subtraction with regrouping\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 19 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Halloween, math centers, sub plans, early finishers, review, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eA zombie raid has broken out, and a list of suspects is all your students have to go on. Only the sharpest math detectives can work out who — or what — is behind it.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve multiplication, division, and multi-digit addition and subtraction clues to gather evidence and rule each suspect out, one by one.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list of suspects shrinks until only one is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues before the zombies close in? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication facts up to 12\u003c\/li\u003e\n  \u003cli\u003eDivision facts up to 12\u003c\/li\u003e\n  \u003cli\u003e4-digit addition with regrouping\u003c\/li\u003e\n  \u003cli\u003e4-digit subtraction with regrouping\u003c\/li\u003e\n  \u003cli\u003eUsing answers to eliminate suspects\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division mystery activity\u003c\/li\u003e\n  \u003cli\u003eMystery story and suspect list\u003c\/li\u003e\n  \u003cli\u003eMultiplication, division, addition, and subtraction clue worksheets\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMultiplication and division facts review\u003c\/li\u003e\n  \u003cli\u003eHalloween and back-to-school math\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951261868402,"sku":"3835041","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/multiplication-division-csi-math-mystery-zombie-raid-grades-3-5.jpg?v=1781747893"},{"product_id":"multiplication-division-facts-csi-math-mystery-worksheets-grades-2-4-mad-scientist-2-5","title":"Multiplication \u0026 Division Facts CSI Math Mystery Worksheets | Grades 2–4 | Mad Scientist (×2 \u0026 ×5)","description":"\u003c!-- HOOK --\u003e\n\u003cp\u003eSneak times-tables practice into a mad-scientist mystery your students will beg to finish. This printable \u003cstrong\u003eMultiplication \u0026amp; Division Facts CSI Math Mystery\u003c\/strong\u003e turns ×2 and ×5 fact review into a detective investigation, built for \u003cstrong\u003eGrades 2–4 classroom teachers, homeschool parents, and tutors\u003c\/strong\u003e who want focused math practice wrapped in a story students actually care about solving.\u003c\/p\u003e\n\n\u003cp\u003eStudents work through a series of clue pages, use their answers to narrow down the options, and race to crack the case — all while getting meaningful practice with their ×2 and ×5 multiplication and division facts. No apps, no prep, no fuss.\u003c\/p\u003e\n\n\u003c!-- QUICK DETAILS --\u003e\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels:\u003c\/strong\u003e Grades 2–4\u003cbr\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Printable PDF\u003cbr\u003e\n\u003cstrong\u003eResource Type:\u003c\/strong\u003e CSI Math Mystery worksheets\u003cbr\u003e\n\u003cstrong\u003eMath Skills:\u003c\/strong\u003e ×2 and ×5 multiplication and division facts, a multiplication maze, and a division cryptogram\u003cbr\u003e\n\u003cstrong\u003ePages:\u003c\/strong\u003e 15 pages including answer key\u003cbr\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Fact-fluency practice, math centers, sub plans, early finishers, small groups, and homeschool math\u003cbr\u003e\n\u003cstrong\u003eTech Needed:\u003c\/strong\u003e None — no apps, locks, passwords, or student logins required\u003c\/p\u003e\n\n\u003c!-- CASE SUMMARY --\u003e\n\u003ch3\u003eCase Summary\u003c\/h3\u003e\n\u003cp\u003eA mad scientist is up to no good, and your students must work out the missing ingredient before it's too late.\u003c\/p\u003e\n\u003cp\u003eAs CSI Math Investigators, students solve ×2 and ×5 multiplication and division clues to gather evidence and rule each option out, one by one.\u003c\/p\u003e\n\u003cp\u003eWith every solved clue, the list shrinks until only one answer is left.\u003c\/p\u003e\n\u003cp\u003eCan your investigators crack the clues and save the day? Sharpen those pencils and solve the case.\u003c\/p\u003e\n\n\u003c!-- SKILLS COVERED --\u003e\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eStudents will practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e×2 and ×5 multiplication facts\u003c\/li\u003e\n  \u003cli\u003eDivision by 2 and 5\u003c\/li\u003e\n  \u003cli\u003eA multiplication maze\u003c\/li\u003e\n  \u003cli\u003eA division cryptogram\u003c\/li\u003e\n  \u003cli\u003eMultiplication and division word problems\u003c\/li\u003e\n  \u003cli\u003eLogic, reasoning, and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCSI-style multiplication and division facts activity\u003c\/li\u003e\n  \u003cli\u003eMystery story\u003c\/li\u003e\n  \u003cli\u003e×2 and ×5 clue worksheets, maze, and cryptogram\u003c\/li\u003e\n  \u003cli\u003eAnswer key\u003c\/li\u003e\n  \u003cli\u003ePrint-and-go PDF format\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- BEST USED FOR --\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eThis printable CSI Math Mystery works well for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e×2 and ×5 times-tables fact fluency\u003c\/li\u003e\n  \u003cli\u003eMath centers and early finishers\u003c\/li\u003e\n  \u003cli\u003eSubstitute teacher plans\u003c\/li\u003e\n  \u003cli\u003eSmall groups, RTI, and intervention\u003c\/li\u003e\n  \u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951261901170,"sku":"4143350","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/multiplication-division-facts-csi-math-mystery-mad-scientist-x2-x5.jpg?v=1781748082"}],"url":"https:\/\/kiwilandeducation.com\/collections\/csi-math-mysteries.oembed?page=2","provider":"Kiwiland Education","version":"1.0","type":"link"}