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"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.

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

Karen C.

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Kiwiland Education

Matariki Addition & Subtraction CSI Mystery Worksheets | Years 4–6 | The Missing Kumara

$4.50 USD

Looking for Matariki math activities or New Zealand addition and subtraction worksheets for upper primary students? This CSI Mystery Detective – The Missing Kumara is a set of no-prep CSI math worksheets that will spark curiosity and critical thinking as students solve problems to uncover who stole the kumara from the hāngi. It's the perfect Māori New Year resource, but also works well any time of year to bring New Zealand culture into the classroom.

This engaging addition and subtraction CSI-style case is great for year 4–6 students and can also support struggling year 7 students or extend capable year 3 learners. Students work through the case by solving puzzles, completing word problems, and eliminating suspects until the thief is revealed.

This Matariki-themed case includes:

  • Subtraction from 100 with 2-digit numbers
  • 2-digit addition with regrouping
  • Addition and subtraction with 3-digit and 1-digit numbers
  • Multi-digit addition problems
  • Word problems with multi-step operations
  • Basic Te Reo Māori language elements
  • Full-color and black-and-white printable versions
  • Answer keys included

CSI Mystery Detective packs are classroom escape-room alternatives—students crack the code not with locks but by solving clues and narrowing down a list of suspects.

Ideal for:

  • Matariki math activities
  • Māori New Year units
  • New Zealand cultural celebrations
  • Math reviews, reliever lessons, and early finishers

Follow me to find more engaging CSI Mystery Detective cases and receive updates, exclusive discounts, and fresh printables for your classroom.

Thank you

Kiwiland

If you are interested in this product and your students enjoy mysteries, I have additional resources that will complement this one.

CSI Mystery - Alien Invasion: https://www.teacherspayteachers.com/Product/CSI-Mystery-Alien-Invasion-3789957

CSI Mystery - Zombie Attack: https://www.teacherspayteachers.com/Product/CSI-Mystery-Zombie-Attack-3799849

CSI Mystery - Jungle Juice Fever: https://www.teacherspayteachers.com/Product/CSI-Mystery-Jungle-Juice-Fever-3765647

Love this resource?

Follow Kiwiland Education to discover more CSI Mystery Detective packs, no-prep math activities, and detective-themed stories for the classroom.

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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.

Matariki hangi missing kumara addition subtraction mystery detective nz

Matariki Addition & Subtraction CSI Mystery Worksheets | Years 4–6 | The Missing Kumara

$4.50

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