ChanceForge

Habgood intrinsic-integration test: **the character's behavior IS the statistical move**.

Level 1

Probability Lab

Run your own experiments — the same simulations as the iOS app, rebuilt for the browser.

Open the lab Flip coins, roll dice, and watch the law of large numbers settle the odds toward what theory predicts.

Explore the sample space

Two hands-on tools that make the counting behind probability visible.

Sample-Space Grid Shade every outcome of two dice for an event, count them, and watch experiments close in on the theory. Probability-Tree Builder Build a two-stage tree branch by branch and learn why you multiply along a path — not add.

Practice the concepts

16 kits from collecting data up to statistical inference — a short round of questions with a hint whenever you get stuck. Your progress stays on this device.

Kit 1: Data Collection & Organization Data & Displays · grades 4-5 · 25 questions Kit 2: Graphs & Data Displays Data & Displays · grades 4-5 · 25 questions Kit 3: Mean, Median, Mode & Range Statistics · grades 5-6 · 25 questions Kit 4: Probability Basics Probability · grades 5-6 · 25 questions Kit 5: Experimental vs. Theoretical Probability Probability · grades 5-6 · 25 questions Kit 6: Compound Events & Sample Spaces Probability · grades 6-7 · 25 questions Kit 7: Statistical Variability & Distributions Statistics · grades 6-7 · 25 questions Kit 8: Statistical Inference & Prediction Inference · grades 7-8 · 25 questions Kit 9: Experimental Probability Probability · grades · 25 questions Kit 10: Compound Events & Trees Probability · grades · 25 questions Kit 11: Statistical Distributions Statistics · grades · 25 questions Kit 12: Data-Driven Decision Making Inference · grades · 25 questions Kit 13: Cross-Topic Connections Data & Displays · grades 5-6 · 25 questions Kit 14: Real-World Applications Data & Displays · grades 6-7 · 25 questions Kit 15: Misconceptions & Reasoning Data & Displays · grades 6-7 · 25 questions Kit 16: Advanced Synthesis Data & Displays · grades 7-8 · 25 questions
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Meet the cast — the characters who teach this

Each one stands for an idea you’ll practice. Tap a character to read their illustrated story and hear their audio drama.

Explore all the stories →

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