Libre University
A free and open university for you to learn anything.
Free courses on any subject, written in plain text and improved by everyone, the way Wikipedia is written, the way open source is built. Pick a language to start reading.
Learn
Start with a subject
Open Calculus, the Roman Republic, or the Silk Road and read it like a good book: one lesson leading into the next. Each lesson teaches a single idea, with the equations, diagrams, and worked examples it needs, then a short test so you know it stuck. Anyone can read every page, and anyone signed in can improve it.
Atoms and Elements
How the atom was found, taken apart and finally explained: from combining weights and Rutherford scattering to orbitals, periodic trends and the chemical bond.
Molecules and Reactions
Why a reaction goes, how fast, and how far: kinetics and equilibrium, acids and bases, and the electron transfers behind every battery.
Beginner Japanese
A complete grounding in Japanese: read both kana and your first hundred kanji, and say what you did, where you went and what you want.
Intermediate Japanese
Hold a real conversation to about B1: build clauses inside sentences, give reasons, report what other people said, and choose how formally to speak.
Classical Mechanics
Predict motion from forces: Newton's laws, energy and momentum, rotation, and the gravitation that holds a planet in its orbit.
Structures
Work out why things stand up: equilibrium and internal forces, stress and strain, beams and buckling, and choosing a material for a load.
Why text
Words you can read, print, and rewrite
Text is precise and quick to skim, it prints and travels anywhere, and (unlike a video) it can be corrected a sentence at a time. That is what makes a course something people can build together instead of a lecture locked behind one institution. Every lesson is rendered fresh, so an improvement to one word reaches every reader at once.