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- Christmas Math Mystery : Case of the Selfish Elf - 2nd Grade Edition

## Christmas Math Mystery : Case of the Selfish Elf - 2nd Grade Edition

**SKU:**SelfishElf2ndgrade

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Christmas Math Mystery: the Case of the Selfish Elf This math activity is a fun way to review and practice mathematical skills in the classroom or at home. Ideal for spiral review, consolidation, math centers, homework, enrichment, early-finisher or the sub-tub.

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

Students must complete math worksheets to unlock clues. Then, use their powers of deduction to narrow down the list of possibilities to solve the mystery case!

**Preparation**

- Easy Prep! Print the student pages, staple or place in a folder, and your students are ready to start the math game of solving the mystery.

- Have the mystery 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: Skip-Counting Sequences (2s, 5s, 10s)

Clue 2: Place Value of the Underlined Digit (Hundreds, Tens, Ones)

Clue 3: Add 3 One-Digit Numbers

Clue 4: Subtracting One-Digit Numbers from Two-Digit Numbers (without regrouping)

Clue 5: Time (O'Clock, Half Past, Quarter Past, Quarter To)

Students must use

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

**There's an optional video hook that you can use to set the stage to engage!**

**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 this math activity will vary anywhere between 30mins - 2 hours or more! It mainly depends on how familiar your students are with the math mystery game 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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Other grade editions of the Case of the Selfish Elf are available if you would like the same mystery game file, but different math involved.

*Answer key included!*

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Not sure what a math mystery is? CLICK HERE to watch a video about Math Mysteries or read this blog post: What is a Math Mystery?

**Read Blog Post: FIVE Easy Ways to use Math Mysteries in your Classroom.**

Check out this blog post to save paper:

**How to Create Reusable Math Mystery Files to Save Paper**

*Please note that the Grade 1 Math Mysteries cannot be 'clue swapped' with other Grade Math Mystery versions for customization/differentiation as you usually can with Grades 2-6.*

Mrs. J.

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