{"product_id":"christmas-addition-subtraction-csi-mystery-grades-2-5-secret-santa","title":"Christmas Addition \u0026 Subtraction CSI Mystery | Grades 2–5 | Secret Santa","description":"\u003cp\u003eDecember Christmas CSI math worksheets on addition and subtraction, wrapped around a Secret Santa mystery the class will want solved. One gift out of the hat was not what it should have been, and nobody will own up. Made for 2nd grade and 3rd grade, this CSI Mystery Detective case works two-digit and three-digit addition and subtraction, and each correct answer strikes one suspect from the list until only the guilty gift-giver is left. Christmas math activities that need nothing but a printer, in color or black-and-white, with answer keys. Students decode a map key, follow an addition path where odd or even settles the clue, and work subtraction through a letter key.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe Case: Secret Santa\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThat time of year has come round again. Everyone has a bit of a skip in their step, a smile for strangers, an extra hug for relatives they see once a decade. Even Mrs McPuffers has gone soft. The Secret Santa names went into the hat, the gifts came out, and one of them was not what it should have been. Nobody will own up, so your students will have to work out who it was.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Inside\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eReading letters off a map with a key to decode the first clue\u003c\/li\u003e\n  \u003cli\u003eAddition along a path where an odd or even final total decides the answer\u003c\/li\u003e\n  \u003cli\u003eAddition problems used to color the correct arrow forward\u003c\/li\u003e\n  \u003cli\u003eThree-digit addition decoded through a letter key\u003c\/li\u003e\n  \u003cli\u003eSubtraction worked through a key to reveal the final clue\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\u003eThe format never changes: a crime, a line-up of suspects, and math that decides which of them it cannot be. A CSI Mystery Detective case is a math escape room that needs a printer instead of locks, an app or any setup. It beats a stack of 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.\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 last weeks of December, when a normal worksheet will not hold them\u003c\/li\u003e\n  \u003cli\u003eClass Secret Santa week, alongside the real thing\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\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 2nd grade and 3rd grade. Second graders usually work the three-digit pages in pairs; third graders run the case independently inside a lesson. It also suits 4th grade students who need addition and subtraction review in a form that does not feel like going backwards.\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 December 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":61981869113714,"sku":"4216910","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/christmas-secret-santa-csi-mystery-detective-grades-2-5-4216910.jpg?v=1792459386","url":"https:\/\/kiwilandeducation.com\/products\/christmas-addition-subtraction-csi-mystery-grades-2-5-secret-santa","provider":"Kiwiland Education","version":"1.0","type":"link"}