Description

Get ready for Valentine’s Day with this Valentine’s Day Math Mystery 2nd-grade Activity! ‘The Case of the Vanishing Valentines’ is a high-engagement February math activity that turns a 2nd-grade 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).
• Easel by TPT: Complete the worksheets digitally for seamless online learning.

Valentines Day Math Mystery 2nd Grade Activity

To find the vanishing valentines, students must unlock five clues by correctly solving:

• Clue 1: Adding Multiples of 10 or 100
• Clue 2: Subtracting Multiples of 10 or 100
• Clue 3: Two-Step Word Problems with Addition and Subtraction
• Clue 4: Place Value of the Underlined Digit (Hundreds, Tens, Ones)
• Clue 5: Skip Counting by 2s, 5s, and 10s

Flexible for Any 2nd Grade Classroom

Use this versatile Valentines Day 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 a Valentine’s Day math activity for 2nd grade?
A: This mystery has a fun “Vanishing Valentines” theme, making it the perfect February math activity. However, it’s a powerful 2nd grade math review printable that you can use any time of year!

Q: What skills does this mystery cover?
A: This is a comprehensive review. Students will practice skip counting, place value (HTO), two-step word problems, and adding/subtracting multiples of 10/100.

Q: What exactly is a Math Mystery?
A: It’s our high-engagement, multimedia math activity! Students solve 5 clues to crack a case, all while watching fun video hooks. You can learn more about math mysteries here.

Q: How does differentiation work with these?
A: That’s our secret weapon! Many of our stories are available for other grades, so you can “clue swap” with the 2-6 grade packs. We even have a blog post explaining how: learn how to differentiate here.

 

This is one of our 2nd Grade Valentine’s Day activities! Be sure to check out the other options (each with different math skills!):

 

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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!

• 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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