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100th Day of School Math Mystery Challenge Activity


Total Pages: 86
File Size: 94 MB


Can your students work in teams to solve problems related to 100 in order to solve the mystery at hand? This is a fun 100th Day of School activity or test prep math activity that will have your students engaged and LOVING every minute of math skills practice and review!

Please click on the PREVIEW above to get a closer look at all the activities included in this resource.

I have teamed up with Megan Mitchell of First Grade Roars to bring you this exciting 100th Day of School Math Mystery Challenge.

Click HERE to see the 1st Grade 100th Day Mystery.

You will begin this activity with a short video that will challenge your students to solve the case of the missing 100th Day Collections. They will have to find out who took them, when they took them, and where they put them. To solve the case, students will work to complete 9 different task cards. Once they complete a task card, they will receive a clue. After they have all 9 clues, they will be able to solve the mystery. As a fun culmination, there are award certificates.

This engaging, high-interest 100th Day activity includes these printables:

  • Teacher Directions
  • CAN YOU SOLVE THE CASE? Display Letters
  • Who, When, and Where Posters
  • A mp3 video to introduce the case
  • Case of the Missing 100th Day Collections Letter (Color and B/W)
  • Posters
  • 9 Task Cards (Color and B/W)
  • Student Response/Answer Journals
  • Clues
  • Student Awards (Color and B/W)
  • Answer Keys

The 9 fun tasks cover this content:

  • Rounding to Nearest 100
  • 100s Grid Questions (factors & multiples)
  • 4 Operations Equaling 100
  • Hundredths Place
  • 100 Cents
  • Multiply by 100
  • Words from ONE HUNDRED
  • Make a List – 100 Items
  • 100 Years

Students can work in teams or individually to complete all 9 tasks. As they complete each of the 9 tasks, they will bring you their answers and you will quickly check them. If they are correct, you will tell them to move onto the next task. They continue this process until all 9 tasks are completed. When they finish, they will be able to solve the mystery.

Click HERE to see my fun, NO-Lock, NO PREP Escape Challenges!

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As always, please contact me with any questions!

Thank you so much,
Shelly Rees

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