Surface Area of Rectangular Prisms
Mystery Detective Worksheets · Grades 6–7 · Six Faces
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Inside the case file
Surface area of rectangular prisms worksheets, finding total surface area practice, and area-of-all-six-faces activities for 6th grade and 7th grade are all included in this no-prep printable Mini Mystery Detective pack of math worksheets. Students work out the surface area of a labeled 3-D prism, match every answer to a suspect's ID badge, and cross names off the line-up until one villain is left standing — perfect for math centers, morning work, early finishers, substitute and relief days, homework, spiral review, and test prep. Completely no prep — just print and go.
What's Inside
- Finding the total surface area of right rectangular prisms from a labeled length, width and height
- Adding the areas of all six faces, or applying SA = 2(lw + lh + wh)
- Recognizing that opposite faces of a prism are congruent, so each area counts twice
- Reading a three-dimensional prism diagram and matching each measurement to the faces it forms
- Practicing in customary units — square feet (ft2) and square inches (in2)
- Logical reasoning and deductive elimination as suspects are ruled out one answer at a time
- Self-checking answer keys for every case
Five school-detective cases to crack: The Gift Wrap Goof, The Cargo Crate Caper, The Paint Shed Puzzle, The Label Mix-Up, and The Display Case Caper. Answer keys included for every case.
What is a Mini Mystery Detective?
A no-prep detective activity where students solve math problems to cross off suspects and unmask the culprit. Think of it as an escape room without the locks — the math has to be right for the elimination to work, so students check themselves as they go. Skill practice plus critical thinking in one engaging, self-checking worksheet set.
When to Use This Resource
- Math centers and rotations
- Morning work and warm-ups
- Early finishers
- Substitute and relief days
- Homework
- Small-group intervention
- Geometry and measurement review
- Spiral review and test prep
- Indoor recess and end-of-term days
Grade Levels
Designed for 6th and 7th graders working on the surface area of rectangular prisms. Also beneficial for struggling 8th graders who need extra practice with the formula, and advanced 5th graders ready for a challenge.
Why Teachers Love Mystery Detectives
- Zero prep — print and teach
- Self-checking, so students get instant feedback without you marking every page
- The detective hook pulls in reluctant and struggling mathematicians
- Each case is a single page, so it is easy to differentiate or stretch across a whole week
- Builds genuine formula fluency alongside logical reasoning
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