Probability Playground

Learning fit

Labels show who asserted each claim.

Hands-on probability lab for ages 9-13 built on predict-test-compare. Spin & Predict uses an unequal spinner (red one-half, blue one-quarter, yellow one-quarter): kids predict first, then spin 1, 10, or 100 times while a bar chart grows and an expected-vs-actual note explains landing near, not exactly on, the fractions. Dice Lab charts one-die fair chances and two-dice sums 2-12 with a pairs explainer for why 7 wins. Coin Streaks flips up to 100 times, tracks the longest heads streak, and teaches that a streak does not change the next flip. A 5-question Chance Words quiz places events on the impossible-to-certain scale.

Subjects

• Mathematics (Developer disclosed)
• Statistics (Developer disclosed)

Skills

• probability (Developer disclosed)
• prediction vs results (Developer disclosed)
• dice sums (Developer disclosed)
• independent events (Developer disclosed)
• chance vocabulary (Developer disclosed)

Standards

Not verified

Practical details

No adult setup

No accounts of any kind. Progress is session-only and resets when the page is reloaded.

Pricing notes: Free to use. No ads, no in-app purchases, no paid tiers.

Developer: Cogitare Labs

Browser or device

• Modern web browser (Chrome, Safari, Firefox, or Edge) on desktop, tablet, or phone. No installation or download required.

Accountability

Material changes

No material public changes recorded.