The library
Everything, arranged so it builds
7 courses across 5 subjects. Start anywhere — but the order inside each subject is deliberate, and the earlier courses genuinely make the later ones cheaper.
Mathematics
Numbers as tools for thought
Estimation, proportion, algebra and the quiet habits that turn arithmetic into judgement. Every idea arrives with something to move, drag or guess.
Thinking in Numbers
Build number sense you can use out loud: estimate fast, read percentages honestly, and keep proportions straight.
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Algebra Unlocked
Stop moving symbols by ritual. See an equation as a balance, a variable as a placeholder, and a formula as a compressed pattern.
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Logic & Reasoning
Argument, tested
How claims connect, where they break, and why a valid argument can still be wrong. Learn to take a statement apart before you agree with it.
Data & Probability
Thinking clearly about uncertainty
Chance, evidence and the traps that fool almost everyone. Build the instinct to ask 'out of how many?' before you trust a number.
Computer Science
The machinery of mechanical thought
Algorithms, circuits and learning systems, built up from parts you can see working. No prior coding needed — only curiosity about how the box decides.
How Computers Think
From a recipe written in painful detail to a circuit that genuinely adds. The mechanical foundations of computation, no coding required.
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Intuition for Neural Networks
What a neuron computes, why layers help, and how a network improves by walking downhill on its own mistakes.
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Science & Physics
The rules the world runs on
Forces, energy and motion, explained through things you have already felt — lifts, brakes, swings and falling coffee cups.
Not sure where to start?
The guided paths sequence these courses toward a goal — rebuilding foundations, reading data honestly, or understanding how machines decide.