The lesson shelf
Ideas that move.
Start with the mechanism, not the vocabulary. Each lab is small enough to understand and complete enough to use. No sign-up, no saved progress, no tracking.
01
Gradient descent, step by step
A point on a loss curve, a learning rate, and sixty steps. Watch the simplest training loop in machine learning find a valley — or miss it.
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How a model picks the next word
Train a readable bigram model in your browser, inspect its next-token probabilities, and sample a sentence at different temperatures.
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