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"Great resource, low prep, easy to use, and fun! Thank you for sharing this! Highly recommend to other teachers!"

Brandie K.

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"My students loved this resource! They were engaged and were able to complete the tasks with ease."

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"I have enjoyed every purchase I've made from your store. The students are always so engaged!"

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Kiwiland Education

Place Value & Skip Counting CSI Mystery Worksheets | Grades 2–4 | The Playground Bandit

$4.50 USD

2nd grade, 3rd grade and 4th grade place value, skip counting and number sequences CSI math worksheets, built into a CSI Mystery Detective case where the Place Value Bandit has scrambled the school playground. The seesaw lifts the heavy end, the hopscotch numbers run in an order nobody recognizes, and the only description of the culprit is the numbers left behind. It doubles as a 3rd grade math or 4th grade math review and suits a March timetable when practice needs a lift. Students finish sequences, skip count through four-digit numbers, compare numbers on the seesaw, and decode letters through a key, crossing off suspects until the mystery is solved. Answer keys included.

The Case: The Place Value Bandit in the Playground

The playground has stopped working properly. The seesaw lifts the heaviest person and drops the lightest, the hopscotch numbers run in an order nobody recognizes, and the whole yard has quietly stopped making sense. The Place Value Bandit has been through, and the numbers left behind are the only description of them anyone is going to get.

What's Inside

  • Number sequences completed to reveal the letter that matters
  • Skip counting patterns running through three-digit and four-digit numbers
  • Comparing two numbers on a seesaw to decide which is greater
  • Checking worked answers for errors and tallying which are correct
  • A key used to decode letters into the next piece of the description
  • Full color and black-and-white versions of every page
  • Answer keys for the whole case

What Is a CSI Mystery Detective Case?

The shape of it is always the same: a crime, a line-up of suspects, and math that decides which of them it cannot be. That is a CSI Mystery Detective case - a math escape room that needs a printer rather than locks, an app or any prep. It beats math worksheets on the same content for one reason: a wrong answer breaks the deduction loudly, so students go back over their own work. It fills a whole lesson, sits in math centers, or works as detective activities for early finishers.

When to Use This Resource

  • Place value and skip counting review before or after a unit
  • Back-to-school weeks and end of year review
  • Math centers, early finishers and independent work
  • Emergency sub plans that run themselves
  • Whole-class detective sessions, small groups or partner work

Grade Levels

Built for 2nd grade, 3rd grade and 4th grade. Second graders usually pair up for the four-digit sequences; third and fourth graders run it independently. It also suits 5th grade students who need a place value refresher without it feeling like going back a year.

Why Teachers Love CSI Mystery Detective Cases

  • Zero prep - print and hand out
  • Self-checking by design, because a wrong answer breaks the deduction
  • Counting and place value practice with a point to it
  • Works as a whole lesson, a center, or a filler for an awkward afternoon

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  • Thank you from Kiwiland Education

"Great resource, low prep, easy to use, and fun! Thank you for sharing this! Highly recommend to other teachers!"

Brandie K.

Verified buyer

"My students loved this resource! They were engaged and were able to complete the tasks with ease."

Gina H.

Verified buyer

"I have enjoyed every purchase I've made from your store. The students are always so engaged!"

Karen C.

Verified buyer

How CSI Math Mysteries Work

CSI Math Mysteries turn regular math practice into a clue-based investigation. Students solve problems, use their answers as evidence, and eliminate suspects until the case is solved.

1

Read the Case

Students begin with a short mystery scenario and find out what needs to be solved.

2

Solve the Clues

Each clue gives students focused math practice using the target skill for that resource.

3

Eliminate Suspects

Students use their answers to remove suspects from the investigation one clue at a time.

4

Crack the Case

By the end, only one suspect remains and students can reveal the answer to the mystery.

No apps, locks, passwords, or student logins are required. Just print and go.

New to the format? Read What Is a Math Mystery? for how they work and how to run one in class.

Why Teachers Use CSI Math Mysteries

CSI Math Mysteries turn skill practice into a clue-based investigation students want to solve. They are easy to prep, flexible for different classroom routines, and help students practice math skills while using logic, reasoning, and careful problem solving.

Teacher-Friendly Review

Practice that feels like a mystery, not another worksheet.

CSI Math Mysteries help students stay focused by turning skill practice into a clue-based case. They are easy to prep, simple to use, and flexible enough for busy classroom routines.

No-Prep and Print-and-Go

Use the pages right away for review, math centers, sub plans, small groups, early finishers, or homeschool math.

Encourages Careful Thinking

Students need accurate answers to eliminate suspects, which encourages checking, reasoning, and attention to detail.

Easy to Fit Into Lessons

Use a full mystery in one session or split the clues across centers, partner work, intervention, or review rotations.

Builds Student Confidence

The mystery format gives students a clear purpose for practicing math skills and helps make review feel more rewarding.

CSI Math Mysteries combine focused math practice with problem solving, logic, and a detective-style task that students can complete independently or with support.

More like this

From CSI Mysteries

See all CSI Mysteries

Frequently Asked Questions For CSI Math Mysteries

Printable CSI Math Mystery worksheets that turn math practice into clue-based detective investigations.

Is this CSI Math Mystery a digital activity?

No. This is a printable PDF resource. Students complete the CSI Math Mystery on paper. No physical item will be shipped.

Do students need apps, locks, passwords, or logins?

No. Students do not need apps, locks, passwords, or logins. Teachers can print the pages and use the CSI Math Mystery straight away.

How do students solve the CSI Math Mystery?

Students solve math clues and use their answers to eliminate suspects. Each correct answer helps them narrow down the case until only one suspect remains.

Can this CSI Math Mystery be used for sub plans?

Yes. CSI Math Mysteries work well for sub plans because students can work through the clues independently, with a partner, or in small groups.

Can this CSI Math Mystery be used for homeschool?

Yes. This printable CSI Math Mystery can be used for homeschool lessons, tutoring, review practice, enrichment, or extra math support.

Will this work for early finishers or math centers?

Yes. CSI Math Mysteries are a good fit for early finishers, math centers, small groups, independent work, review lessons, and extra practice activities.

Place value bandit school playground mystery detective grades 2-4

Place Value & Skip Counting CSI Mystery Worksheets | Grades 2–4 | The Playground Bandit

$4.50

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