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- Back to School Math Mystery: The Case of the School Invaders - 1st Grade Math Worksheets

## Back to School Math Mystery: The Case of the School Invaders - 1st Grade Math Worksheets

**SKU:**SchoolInvadersGRADE1

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Back to School Math Mystery: the Case of The School Invaders -1st Grade Edition. Students must review math skills from the previous grade to help get rid of the stinky, slimy Geometron aliens invading Mathhattan Elementary School!

**Easy prep! Just Print & Solve! Or go paperless with the new Google Slides option provided within your download.**

(Please note that the Grade 1 math mysteries contain a smaller possibilities list, and include profile pictures with the information).

Students must use their math skills to unlock clues. Then, use their powers of deduction to narrow down the list of locations to find the aliens' transponder device!

- No Prep required! Print the student pages, staple or place

in a folder, and your students are set to go.

- Have the video hook ready for viewing at the start of the

lesson on an IWB, iPad or computer monitor screen.

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Math Skills Required to Unlock Clues

There are five clues to crack to solve the mystery:

Clue 1: Counting (1-20)

Clue 2: Add with Pictures (1-10)

Clue 3: Subtract with Pictures (1-10)

Clue 4: Comparing Numbers (0-11)

Clue 5: Missing Numbers (1-30)

Students must use critical thinking skills to figure out what the clue is telling them to eliminate from the list of possibilities.

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Multiple Uses

- Suitable for independent, pairs, or group work.

- Use as part of your math centers, add to your sub tubs, make it part of your early finisher tasks, give for homework, or make it part of your classroom practice/review sessions.

I recommend pacing this activity by giving students one clue at a time. Once the whole class has completed a clue, then move on to the next clue either within the same lesson or the next math session. New math content presented? Make a lesson out of it by modeling the math before diving into the clue. I like to say, "we must learn something new before attempting the next clue."

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How long will this activity take?

Time to complete will vary anywhere between 30mins - 2 hours or more! It mainly depends on how familiar your students are with the math mystery format, as well as how difficult they find math skills covered in the particular mystery. Please check the math skills outlined in the clues above to help determine suitability for your class.

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If you would like more challenging math skills, select a higher grade level version of this mystery.