Free Learning Guides
Free, kid-friendly explainers across every subject we teach — one concept per page.
Physics (Feynman Lectures)
Richard Feynman's physics, one big idea at a time — for curious K-12 minds.
93 guides →Latin
A no-nonsense Latin field guide: grammar that actually sticks.
23 guides →Critical Thinking
Philosophers, mental models, and thinking traps — explained for kids.
23 guides →History & Social Studies
The people, places, and turning points that shaped the world.
15 guides →Institutions & the Soviet Legacy
What Soviet institutions teach us about designing systems that work.
17 guides →Spelling & Word Origins
Etymology and commonly-confused words, demystified.
14 guides →