Real coding skills from student teachers, completely free, forever. Take the full course on Udemy, or work through the interactive lessons right here.
Zero experience? Perfect. Part 1 takes you from nothing to building real projects, just like 800+ students across 50+ countries already have. Part 2 goes deeper on the data structures real programs are built from: advanced lists, nested data, and the errors messy data actually throws.
The two languages every website is made of, and the fastest thing in programming to see working — save a file, refresh, it changed. Twenty-four chapters take you from your first line of markup through semantic HTML, the cascade, the box model, flexbox and grid, to a real page you build by hand and publish. No framework, no build step.
The tool every developer uses every day, and the platform every project lives on. Twenty-one chapters take you from your first commit through branches, merge conflicts, and rebasing, to pull requests, code review, and your first contribution to somebody else's open-source project.
Build a real obby and publish it, so other people can actually play what you made. You'll write Luau for lasers, disappearing platforms, and one-way floors — and learn why each of them breaks the moment a second player joins.
Build real apps using AI tools like Cursor and Copilot. Part 1 gets you shipping; Part 2 goes deeper on prompting and reviewing what the AI writes. This is where coding is headed: fast, creative, and full of purpose.
Curious how machines actually learn? Part 1 starts from the ground up with data, models, and your first predictions. Part 2 trains smarter models, dodges the classic beginner pitfalls, and builds projects worth showing off.
The money skills every student should have: budgeting, saving, credit, and investing, taught simply and without the jargon.
See where healthcare meets technology, from medical data to digital health careers, and learn how code is already saving lives.
Students around the world learning Python, building projects, and discovering that code can be a tool for good.
Open source
Every lesson here was written by a student. Propose your own topic, or fix one that confused you. Drafts stay invisible until they are ready, so nothing you start can break the site.