{"product_id":"addition-subtraction-csi-mystery-grades-2-5-my-teacher-is-an-alien-back-to-school","title":"Back to School Addition \u0026 Subtraction CSI Mystery Worksheets | Grades 2–5 | My Teacher is an Alien","description":"\u003cp\u003eBack to school addition and subtraction CSI math worksheets with a twist: this CSI Mystery Detective case asks students to prove their new teacher is an alien. Skin, eyes, ears, number of arms, every line of the description comes from a problem within 200, which makes it a sharp August and September math activity for 3rd grade and 4th grade. Color and black-and-white versions are both included, so the only setup is pressing print. Students color the correct arrow to the next clue, decode a message off a space map, and follow an odd-or-even path, ruling out one suspect at a time until the mystery is closed. Answer keys cover the whole case.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe Case: My Teacher is an Alien\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eYou have always been a bit nervous around this teacher. The clothes are too perfect. The laugh is too loud, and always half a second late. The smile does not quite reach anywhere. Everybody else says you are imagining it, so the only way to settle it is evidence: the skin, the eyes, the ears, the number of arms, worked out one math problem at a time.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Inside\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eAddition problems used to color the correct arrow to the next clue\u003c\/li\u003e\n  \u003cli\u003eChecking worked answers for errors and tallying which are correct\u003c\/li\u003e\n  \u003cli\u003eReading letters off a space map with a key to decode a message\u003c\/li\u003e\n  \u003cli\u003eAddition along a path where an odd or even final total decides the answer\u003c\/li\u003e\n  \u003cli\u003eA matching page where the line drawn passes through the letter that matters\u003c\/li\u003e\n  \u003cli\u003eFull color and black-and-white versions of every page\u003c\/li\u003e\n  \u003cli\u003eAnswer keys for the whole case\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is a CSI Mystery Detective Case?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eYour students get a crime, a line-up and a page of math worksheets - nothing else. The answers do the eliminating: one right answer, one suspect gone, until only the culprit is left. That is a CSI Mystery Detective case, and it works like a math escape room without the locks or the login. It also marks itself, which a practice page never does, because a wrong answer leaves a description matching nobody. Run it as a whole math activity, in math centers, or as detective activities for early finishers.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhen to Use This Resource\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eThe first weeks back at school, when you want the math to feel like fun\u003c\/li\u003e\n  \u003cli\u003eMath centers, early finishers and independent work\u003c\/li\u003e\n  \u003cli\u003eEmergency sub plans that run themselves\u003c\/li\u003e\n  \u003cli\u003eEnd of year review, when attention is thin and the work still has to happen\u003c\/li\u003e\n  \u003cli\u003eWhole-class detective sessions, small groups or partner work\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eGrade Levels\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for 3rd grade and 4th grade. Third graders usually run it comfortably on their own; fourth graders finish it inside a lesson and often ask for another. It also suits 2nd grade students who are ahead and need something with more thinking in it than extra practice.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy Teachers Love CSI Mystery Detective Cases\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eZero prep - print and hand out\u003c\/li\u003e\n  \u003cli\u003eSelf-checking by design, because a wrong answer breaks the deduction\u003c\/li\u003e\n  \u003cli\u003eA back-to-school activity that still does real math\u003c\/li\u003e\n  \u003cli\u003eWorks as a whole lesson, a center, or a filler for an awkward afternoon\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLove this resource?\u003c\/p\u003e\n\n\u003cp\u003eFollow Kiwiland Education for new detective cases, seasonal math activities and updates on discounts and new releases.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/www.teacherspayteachers.com\/Sellers-Im-Following\/Add\/Kiwiland\" target=\"_blank\" rel=\"noopener\"\u003eFollow Kiwiland Education on TPT ↗\u003c\/a\u003e\u003c\/p\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":61951738315122,"sku":"3990720","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/my-teacher-is-an-alien-csi-mystery-detective-back-to-school-grades-3-4-3990720.jpg?v=1792459386","url":"https:\/\/kiwilandeducation.com\/products\/addition-subtraction-csi-mystery-grades-2-5-my-teacher-is-an-alien-back-to-school","provider":"Kiwiland Education","version":"1.0","type":"link"}