Games

Learn the same things the tools teach, but as 30-second sprints. Compete on the global leaderboard, or create a private group for your class or team.

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For teachers and teams

Make a private scoreboard for your class or workplace — share one link, no accounts needed.

⚡ Electronics

Read the bands, pick the value. 30 questions against the clock.

3- and 4-digit SMD resistor codes — match each to its value.

Given a CIDR, find network, broadcast, and usable host count.

Symbol → name → atomic number. Sprint mode and category mode.

Speed arithmetic — addition, subtraction, multiplication, division.

Simplify, compare, and add fractions under time pressure.

Discount, markup, tip — solve fast.

Read and write Roman numerals, including year-style cases.

Set angle and velocity to land on a target. Equation visible.

Solve for the missing variable so the car stops in time.

cups ↔ mL, oz ↔ g, °F ↔ °C — 60-second sprint.