Mother's Day Multiplication & Division CSI Mystery Worksheets

Inside the case file

Mothers Day multiplication and division CSI math worksheets for May, wrapped up as a CSI Mystery Detective case about a box of chocolates that vanished the day before Mom's big morning. Multiplication and division facts carry the case, with map reading and a trail of hearts for 3rd grade and 4th grade students who want a multiplication mystery with some bite. Your big brother is being suspiciously helpful, the hiding place is empty, and there is one afternoon to find those chocolates. Every page prints ready to go, with answer keys included. Students color the right heart, decode division facts through a key and unscramble letters from a grid, ruling out a suspect each time.

The Case: The Missing Chocolates

Big brothers are a problem, and yours is no exception. You saved up, bought your mom a box of chocolates, wrapped them properly and hid them where nobody would look. This morning the hiding place is empty and your brother is being extremely helpful about it. Mothers Day is tomorrow. Your students have one afternoon to find out where those chocolates went.

What's Inside

• Multiplication used to color the correct heart and arrow forward
• Division facts decoded through a key to narrow down the location
• Reading letters off a map with a key to solve a secret message
• Addition along a trail of hearts where an odd or even total settles the clue
• Circling letters on a grid using multiplication answers, then unscrambling them
• Full color and black-and-white versions of every page
• Answer keys for the whole case

What Is a CSI Mystery Detective Case?

Students are the detectives and math is the only evidence they are given. That is the whole of a CSI Mystery Detective case: work the page, rule a suspect out with every correct answer, close the case on the last name standing. It runs as a math escape room with no locks, no app and no prep. It is also self-marking in practice, which ordinary math worksheets are not - a wrong answer produces a culprit who cannot exist. Use it as a math activity, in math centers, or as a sub plan.

When to Use This Resource

• Mothers Day in May, alongside cards and gifts your class is already making
• Multiplication and division fact practice that is not a timed test
• Math centers, early finishers and independent work
• Emergency sub plans that run themselves
• End of year review, when attention is thin and the work still has to happen

Grade Levels

Built for 3rd grade and 4th grade. Third graders may want their times tables to hand for the grid page; fourth graders run the whole case independently inside a lesson. It also suits 5th grade students who need multiplication and division fact review with something at stake.

Why Teachers Love CSI Mystery Detective Cases

• Zero prep - print and hand out
• Self-checking by design, because a wrong answer breaks the deduction
• A Mothers Day activity that still does real math
• Works as a whole lesson, a center, or a filler for an awkward afternoon

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