Interactives
Things to play with: simulations, explorable explanations and games.
For everyone
Cartoon planner
Plan a cartoon from first idea to finished plan. Characters, their moves, story, scenes and shots, then download everything as one file.
Linear algebra for LLMs
A flashcard refresher on the linear algebra inside transformers, one idea per card, with skippable checks. Vectors, matmuls, shapes, attention, low rank, gradients.
Speak like a leader🔒 Locked
Executive English for engineers at B2/C1. Vocabulary, live conversations and presence.
For kids
Adding and taking away
Addition and subtraction for ages 4–6. Build numbers from tens and ones.
Adding tens
Tens and ones for ages 5–7. Count rods by tens, read two-digit numbers, then add tens and carry.
Rule Machines
Functions for ages 7–9. Feed numbers into rule machines, then slide x and watch y climb on a grid.