Grade 4 Math Mystery Activity Book for Kids Ages 8–11 | 20 Detective Cases

Grade 4 Math Mystery Activity Book for Kids Ages 8–11, 20 Detective Cases | Math Puzzles, Secret Codes & Problem-Solving Adventures

Solve the math. Decode the clues. Catch the culprit!

Welcome to Whirligig Windmill Village, where something mysterious is happening and every number holds a clue!

In Murder at the Whirligig Windmill Village by Lillian Jacobs, young detectives must solve 20 math-based mystery cases to uncover the truth behind a larger village mystery.

From missing flour scoops and swapped grain sacks to mysterious clues hidden around the village, every case challenges children to think carefully, solve math problems, and eliminate suspects.

This isn't an ordinary fourth-grade math workbook. It's a detective adventure where math is the key to solving every mystery!

🔎 What's Inside?

• 20 Math Detective Mysteries: Investigate missing objects, suspicious villagers, and unusual events.

• 5 Math Clues Per Case: Solve puzzles that provide evidence to eliminate suspects.

• Secret Messages and Codes: Practice math skills while decoding hidden clues.

• Suspect Elimination Challenges: Use deductive reasoning to identify the culprit.

• Maps and Grid Puzzles: Follow directions, calculate distances, and discover hidden locations.

• Detective Case Reports: Record conclusions and explain the evidence.

• Detective Rank Tracker: Progress from Rookie Detective to Master Detective.

• Final Mystery: Combine clues collected throughout the book to solve the ultimate case.

• Solutions Included: Check work and review the answers.

✏️ Math Skills Kids Will Practice

Designed around fourth-grade math concepts, this educational mystery activity book includes:

• Multiplication and division

• Multi-digit multiplication

• Word problems

• Fractions-free number patterns and missing factors

• Order of operations

• Area and perimeter

• Elapsed time

• Measurement conversions

• Maps, scale, coordinates, and grids

• Number properties and rounding

• Logic, reasoning, and problem-solving

Each math challenge has a purpose: solving the case and getting one step closer to the truth.

🕵️ Why Kids Will Love It

They're the detective. Instead of completing unrelated worksheets, children investigate suspects and follow clues.

Every answer matters. Solving each puzzle reveals evidence that brings them closer to identifying the culprit.

It's a continuing adventure. Twenty individual cases contribute clues to one final mystery.

They can track their progress. A detective rank system encourages children to complete each investigation.

📚 Great For

• Fourth-grade math enrichment

• Homeschool math activities

• Independent learning and problem-solving

• Kids who enjoy mysteries, puzzles, and detective games

• Educational activities during school breaks

• Screen-free entertainment

• Gifts for curious kids ages 8–11

Book Details

Title: Murder at the Whirligig Windmill Village

Author: Lillian Jacobs

Series: Math Detectives

Recommended Ages: 8–11

Grade Level: Grade 4

Mysteries: 20 detective cases plus a final mystery

Length: 315-page PDF

Subjects: Mathematics, Logic Puzzles, Critical Thinking, Mystery Games

Can You Solve the Final Mystery?

Every solved case reveals another piece of the puzzle. Follow the evidence, decode the hidden messages, and discover who is behind the mystery at Whirligig Windmill Village.

Grab your pencil, sharpen your math skills, and become the village's next Master Detective!