Learn coding from the ground up.

Free, beginner-friendly lessons that take you from zero to confident. No experience required.

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New to programming? Begin with these core lessons.

Learn what programming is, why it matters, and how creating software differs from just using it.

Understand what source code is, how it differs from machine code, and why we use programming languages.

Learn how a program runs step by step, what execution order means, and how programs make decisions.

Learn what variables are, how to create them, and how they store data your program can reuse.

Pick a path and work through it step by step.

12 lessons

From zero to your first lines of code

10 lessons

How the web works, from the ground up

10 lessons

The language of the web, step by step

8 lessons

Track your code and collaborate

5 lessons

Python for absolute beginners

Hands-on tools and references to reinforce what you learn.

296+ browser-based tools that run locally.

Copy-paste code snippets for common tasks.

82+ programming cheatsheets for quick reference.

API and language reference documentation.

In-depth articles on engineering topics.

Interactive exercises with instant feedback to reinforce each concept.