Courses designed for retention, not just exposure.

Every lesson is built around 9 evidence-backed teaching principles. You learn by doing, get instant feedback, and remember what you learned a month later.

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Why this works

The 9 principles built into every lesson

Principle 01

Why first

Every lesson opens with the problem it solves. Hook the brain before details.

Principle 02

Small chunks

One idea per stage. Working memory is limited; we respect that.

Principle 03

Examples first

Concrete cases first, abstract rules second. Pattern recognition beats memorization.

Principle 04

Active doing

Every chunk ends with a quiz, problem, or build. Recall beats re-reading 2x.

Principle 05

Spaced practice

A real review schedule: +1 day, +3 days, +1 week, +2 weeks.

Principle 06

Interleaving

The boss challenge mixes prior concepts so retrieval generalizes.

Principle 07

Explain back

Feynman: if you can explain it simply, you understand it.

Principle 08

Specific feedback

Wrong answers get the actual reason, not "try again".

Principle 09

Real use

Every lesson ends with how you'll actually use this skill.