Writing code on a laptop keyboard

Long form explainers that start with a question most people get wrong, then work through the physics until it makes sense.

Veritasium - Physics and Engineering, Explained

Linear algebra, calculus and neural networks taught through animation, aimed at building intuition before notation.

Complete recorded lecture series in computer science, physics and mathematics, matched to the published course notes.

Working mathematicians talking through problems, proofs and oddities on brown paper, one idea per video.

Compressed walkthroughs of frameworks, languages and developer tooling, usually in about a hundred seconds.

Video lessons and exercises from arithmetic through calculus, plus science, economics and test preparation, free to use.

Routing, rendering, data fetching and deployment guides for the React framework, with side by side app and pages examples.

The official walkthrough of the language: data structures, functions, classes, modules and the standard library, with worked examples.

Free preprint archive for physics, mathematics, computer science, quantitative biology and statistics, updated every weekday.

Ownership, borrowing and lifetimes explained from first principles, with projects that build up a working command line program.

Structured courses and certificates taught by university faculty and industry teams, with deadlines and graded work.