Description
Save the day and restore the love with this Valentine’s Day Math Mystery 4th Grade activity! ‘The Case of the Heartbroken Heroes’ is a high-engagement math review designed to practice perimeter, fractions, and time with a fun superhero twist that appeals to everyone (even the anti-Valentine’s crowd!).
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.
Valentine’s Day Math Mystery 4th Grade Activity
To help the heroes, students must unlock five clues by correctly solving a mix of measurement and operation skills:
- Clue 1: Multiplication (Multiplying Whole Numbers by Ten – practicing place value shifts)
- Clue 2: Fractions (Adding Fractions with Like Denominators – simplifying/reducing required)
- Clue 3: Measurement (Calculating Perimeter – includes both Customary and Metric options)
- Clue 4: Time (Reading clocks and calculating Elapsed Time by adding 45 minutes)
- Clue 5: Decimals (Adding Money/Price Lists with decimals)
Flexible for Any 4th Grade Classroom
Use this versatile February math worksheets alternative for:
- A fun Valentine’s Day activity for students who love superheroes
- 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 4th Grade Math Review
Q: Does this cover Reducing Fractions?
A: Yes! Clue 2 requires students to Add Fractions (Standard 4.NF.B.3) and then simplify/reduce their answers to simplest form. This is excellent practice for fraction equivalency.
Q: Is the Perimeter activity Metric or Customary?
A: Both! We know schools use different systems, so pages 8 & 9 include options for both Customary and Metric units. You can print the version that suits your curriculum best.
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.
Other Grade Editions Available!
Love this ‘Heartbroken Heroes’ theme? This mystery is also available for other grade levels (great for differentiation)!
- Kindergarten EditionÂ
- 1st Grade EditionÂ
- 2nd Grade Edition
- 3rd Grade Edition
- 5th Grade Edition
A complete answer key and printable awards are included!








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