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"Great resource, low prep, easy to use, and fun! Thank you for sharing this! Highly recommend to other teachers!"

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"My students loved this resource! They were engaged and were able to complete the tasks with ease."

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Kiwiland Education

Fractions CSI Mystery Worksheets | Grades 3–6 | Fraction Finders: The Jungle Quest

$4.50 USD

CSI Mystery Detective work on fractions: equivalent fractions, ordering fractions, simplest form and improper fractions to mixed numbers, as jungle-themed CSI math worksheets for 4th grade, 5th grade and 6th grade in November. Deep in the jungle sits a ruined temple full of forks, drops and traps, and everyone who went for the treasure is still in there, because every turn is decided by a fraction. Students compare fractions to send the pulley lift up or down, order fractions to find the safe route, and convert an improper fraction to settle the final distance, crossing a suspect off at every stage. Print in color or black and white and go, with answer keys for the whole mystery.

The Case: The Jungle Quest

Deep in the jungle your students find a ruined temple that has been standing since long before anyone kept records. The local tribe know about it, and they know about the treasure inside, but none of them will go near it. Everyone who has tried is still in there. The temple is full of forks, drops and traps, and every one of them is decided by a fraction.

What's Inside

  • Equivalent fractions used to decide which way to turn at a statue
  • Comparing fractions to work out whether to ascend or descend a pulley lift
  • Converting fractions to their simplest form to get past an obstacle
  • Ordering fractions to find the safe route through
  • Converting improper fractions to mixed numbers to settle the final distance
  • Full color and black-and-white versions of every page
  • Answer keys for the whole case

What Is a CSI Mystery Detective Case?

A CSI Mystery Detective case is math practice with a culprit at the end of it. Students work the page, each correct answer rules a suspect out, and the case closes when one name is left. It runs like a math escape room stripped of the props - no locks, no app, no prep - and it is much harder to coast through than ordinary math worksheets, because the arithmetic has to hold or nothing lines up. Run it as a math activity, in math centers, or as detective activities for early finishers.

When to Use This Resource

  • Fraction review before or after a unit test
  • Math centers, early finishers and independent work
  • Emergency sub plans that run themselves
  • End of year review, when attention is thin and the work still has to happen
  • Whole-class detective sessions, small groups or partner work

Grade Levels

Built for 5th grade, and it works across 4th grade and 6th grade depending on where your class is with fractions. Fourth graders usually need support on the improper fraction pages and pair up for them; sixth graders finish it inside a lesson and treat it as revision.

Why Teachers Love CSI Mystery Detective Cases

  • Zero prep - print and hand out
  • Self-checking by design, because a wrong answer breaks the deduction
  • Fraction practice students will actually finish
  • Works as a whole lesson, a center, or a filler for an awkward afternoon

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  • Thank you from Kiwiland Education

"Great resource, low prep, easy to use, and fun! Thank you for sharing this! Highly recommend to other teachers!"

Brandie K.

Verified buyer

"My students loved this resource! They were engaged and were able to complete the tasks with ease."

Gina H.

Verified buyer

"I have enjoyed every purchase I've made from your store. The students are always so engaged!"

Karen C.

Verified buyer

How CSI Math Mysteries Work

CSI Math Mysteries turn regular math practice into a clue-based investigation. Students solve problems, use their answers as evidence, and eliminate suspects until the case is solved.

1

Read the Case

Students begin with a short mystery scenario and find out what needs to be solved.

2

Solve the Clues

Each clue gives students focused math practice using the target skill for that resource.

3

Eliminate Suspects

Students use their answers to remove suspects from the investigation one clue at a time.

4

Crack the Case

By the end, only one suspect remains and students can reveal the answer to the mystery.

No apps, locks, passwords, or student logins are required. Just print and go.

New to the format? Read What Is a Math Mystery? for how they work and how to run one in class.

Why Teachers Use CSI Math Mysteries

CSI Math Mysteries turn skill practice into a clue-based investigation students want to solve. They are easy to prep, flexible for different classroom routines, and help students practice math skills while using logic, reasoning, and careful problem solving.

Teacher-Friendly Review

Practice that feels like a mystery, not another worksheet.

CSI Math Mysteries help students stay focused by turning skill practice into a clue-based case. They are easy to prep, simple to use, and flexible enough for busy classroom routines.

No-Prep and Print-and-Go

Use the pages right away for review, math centers, sub plans, small groups, early finishers, or homeschool math.

Encourages Careful Thinking

Students need accurate answers to eliminate suspects, which encourages checking, reasoning, and attention to detail.

Easy to Fit Into Lessons

Use a full mystery in one session or split the clues across centers, partner work, intervention, or review rotations.

Builds Student Confidence

The mystery format gives students a clear purpose for practicing math skills and helps make review feel more rewarding.

CSI Math Mysteries combine focused math practice with problem solving, logic, and a detective-style task that students can complete independently or with support.

More like this

From CSI Mysteries

See all CSI Mysteries

Frequently Asked Questions For CSI Math Mysteries

Printable CSI Math Mystery worksheets that turn math practice into clue-based detective investigations.

Is this CSI Math Mystery a digital activity?

No. This is a printable PDF resource. Students complete the CSI Math Mystery on paper. No physical item will be shipped.

Do students need apps, locks, passwords, or logins?

No. Students do not need apps, locks, passwords, or logins. Teachers can print the pages and use the CSI Math Mystery straight away.

How do students solve the CSI Math Mystery?

Students solve math clues and use their answers to eliminate suspects. Each correct answer helps them narrow down the case until only one suspect remains.

Can this CSI Math Mystery be used for sub plans?

Yes. CSI Math Mysteries work well for sub plans because students can work through the clues independently, with a partner, or in small groups.

Can this CSI Math Mystery be used for homeschool?

Yes. This printable CSI Math Mystery can be used for homeschool lessons, tutoring, review practice, enrichment, or extra math support.

Will this work for early finishers or math centers?

Yes. CSI Math Mysteries are a good fit for early finishers, math centers, small groups, independent work, review lessons, and extra practice activities.

Equivalent improper ordering fractions jungle quest CSI mystery detective

Fractions CSI Mystery Worksheets | Grades 3–6 | Fraction Finders: The Jungle Quest

$4.50

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