Description

Wrap up the school year with this End of Year Math Mystery 2nd grade Activity! ‘The Case of the Graduation Gremlins’ is a high-engagement 2nd grade math review that turns a standard review into an exciting case-solving mission.

It’s the perfect no-prep math activity! This resource is loaded with options, including an optional video hook and a NEW ending video (with voiceovers!) to wrap up the case!

Easy Prep for Print or Digital

This resource is designed to be low-prep for you and high-engagement for your students.

• Printable PDF Version: Just print the worksheets, staple, and go.
• Google Slides Digital Version: 100% paperless! Simply assign in Google Classroom. (Students must be in ‘edit mode’ to type).

End of Year Math Mystery 2nd grade Activity

To stop the gremlins, students must unlock five clues by correctly solving:

• Clue 1: Addition & Subtraction algorithms (2-digit numbers, with regrouping)
• Clue 2: Identify the shape being described (2D and 3D)
• Clue 3: Place Value (3-digit numbers)
• Clue 4: Counting Patterns
• Clue 5: Making 100 (fill in the missing number, addition, and subtraction)

Flexible for Any 2nd Grade Classroom

Use this versatile End of Year math activity for:

• A fun spiral review
• Math centers or stations
• Homework or enrichment
• Your “early finisher” tub
• A lifesaver for your sub-tub!

Pacing & Timing

This is a comprehensive review that can take anywhere from 30 minutes to 2+ hours, depending on your students’ skill level. We recommend pacing it by one clue at a time.

Common Questions for this 2nd Grade Math Review

Q: Is this just an End of Year math activity for 2nd grade?
A: This mystery has a fun ‘Graduation Gremlins’ theme, making it the perfect last week of school math activity. However, it’s a powerful 2nd grade math review printable that you can use any time!

Q: What skills does this mystery cover?
A: This is a comprehensive review. Students will practice addition and subtraction with regrouping, place value (3-digits), identifying 2D and 3D shapes, and making 100.

Other Grade Editions Available!

Love this ‘Graduation Gremlins’ theme? This mystery is also available for other grade levels (great for differentiation)!

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A complete answer key and printable awards are included!

 Frequently Asked Questions & Extras

• How long does a Math Mystery usually take to complete? Most of my mysteries are designed to take approximately 40–60 minutes. This can vary depending on whether students work individually or in pairs. Many teachers also love using them as a “Friday Fun” activity or breaking them up over two shorter sessions.
• Is there any prep involved? I know how busy you are, so I keep it “Print & Go.” There is no cutting, laminating, or complex setup required. Just print the clue pages and the opening story, and you are ready to start the investigation!
• What is a Math Mystery? How do I use them in the classroom or homeschool? <Check out this blog post to read more about how to use these teaching resources>
• How does differentiation work with these? That’s our secret weapon! Many of our stories are available for other grades, so you can “clue swap.” We even have a blog post explaining how: learn how to differentiate here.

• Add extra motivation: Download the Mystery Record & Rank Chart FREEBIE HERE
• Looking for more 2nd-grade resources? Math Mystery Worksheets & Activity Sheets for Teachers

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