Turn math practice into a spooky investigation! This CSI Math Mystery challenges students with printable math worksheets that feature 3-digit addition and subtraction regrouping problems while they uncover who—or what—is stealing items from the hallway lockers.
Perfect for 2nd, 3rd, and 4th grade (and helpful for 5th-grade intervention), this ghost-themed activity blends worksheets, mazes, and puzzles into one engaging case file. Students eliminate suspects by completing each math clue until they discover the guilty locker.
Seasonal & Flexible Uses
Ideal for Halloween week, back-to-school energy, spiral review, test-prep season, early finishers, substitute days, homeschool math lessons, and end-of-year motivation. Many teachers hand out one clue per day to build suspense!
🔍 What Is a CSI Math Mystery?
CSI Math Mysteries are printable, escape-room–style activities. Students solve themed puzzles, eliminate suspects, and crack the case—no locks, apps, or extra tech required. They build critical-thinking skills while making math review feel like an exciting game.
Skills Covered
- 3-digit subtraction with regrouping (algorithm)
- Maze of subtraction problems with regrouping
- 3-digit addition with regrouping (algorithm)
- Puzzle of regrouping worksheets for addition practice
- Adding multiple 3-digit numbers to find a final sum
What’s Included
- Printable CSI Math Mystery story and suspect roster
- 5 math-clue pages (worksheets, maze, puzzle)
- Teacher directions & answer key
- Optional daily-clue pacing guide
- No subscriptions or external logins required
📎 Please Note: This is a printable PDF product. After purchase, download the file and print for your students.
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