Learn // by help.ai
See how things work.
A circuit bench with a supply, a meter, a resistor switch and a red LED. Turn up the voltage, change the resistor, and see what too much current does. 1,595 topics for ages 4 to 15, free, with nothing to sign up for.
Labs // play
Labs you can play with
Real objects, built to scale. Each one plays like a short film, then hands you the controls.
- 01
3DBalance 3x + 5 = 20An equal-arm balance with boxes of x and 50 g units. Take the same from both sides until x stands alone, and watch the beam answer.Mathematics - 02
FigureWhy an LED needs a resistorA circuit bench with a supply, a meter, a resistor switch and a red LED. Turn up the voltage, change the resistor, and see what too much current does.Electronics - 03
Live simFind the slowest stepA croissant bakery running live, eight stations from mixer to packer. The slowest one sets the pace: add a machine and watch the bottleneck move.Mathematics
Topics // by subject
Start with a subject
Every subject opens into areas, and every area runs from the first idea to the hardest one.
- 01MathCounting, place value, the four operations, fractions, measurement, geometry, data, probability, ratio and early algebra.504 topicsAges 4 to 15
- 02EnglishPhonics, reading comprehension, spelling, vocabulary, grammar and punctuation, handwriting, writing, speaking and listening.286 topicsAges 4 to 14
- 03ScienceLiving things, habitats, the human body, materials, forces, energy, light and sound, Earth and space, and scientific inquiry.547 topicsAges 5 to 14
- 04HistoryAncient Egypt, Greece and Rome, medieval life, and how historians use sources and evidence.90 topicsAges 5 to 14
- 05ComputingHow computers and artificial intelligence work, where they appear in daily life, and how to use them fairly and safely.21 topicsAges 5 to 11
- 06Personal & social developmentUnderstanding and managing feelings, self-awareness, empathy, friendship, cooperation and responsible decision-making.88 topicsAges 5 to 14
- 07Life skillsMoney, saving, budgeting and spending wisely, plus how businesses find customers, cover costs and sell ideas.37 topicsAges 5 to 11
- 08Learning to learnHabits that make learning work: planning a task, checking work, learning from mistakes and setting goals.18 topicsAges 5 to 11
- 09ElectronicsCircuits, current and voltage, and the components that light, sense and move: the foundations for building with a microcontroller.4 topicsAges 8 to 15
Topics // by age
Or start from an age
Everything a learner of that age is likely to meet, across every subject.