~/interactive-courses · es/en

Learn to
code
with real code

Nothing to install. You write and run code in the browser, exercises grade themselves, and you end up pair-programming with Claude.

Start free →See the syllabus

lessons

modules

to start

included

▶ playground.jsjavascriptEN VIVO

// try it here — change the code and hit Run

$ how --it-works

Nothing to install

It all happens in your browser, at your pace.

Learn

Short, clear lessons with code examples you can touch and break without fear.

Practice

Self-grading exercises: you write code and know instantly whether it works.

Ship

You build real projects and put them online on your own domain.

$ ls ./courses

The courses

Start free. No card, no excuses.

Programming from scratch

From zero to shipping real projects and coding with AI.

Free

Foundations5 lessons

JavaScript: the language8 lessons

Front-end: HTML & CSS8 lessons

JavaScript in the browser6 lessons

Back-end: the server5 lessons

Databases5 lessons

Basic architecture5 lessons

To the real world: deploy6 lessons

Basic security6 lessons

Quality4 lessons

Programming with Claude9 lessons

Final project3 lessons

Start free →See the syllabus70 lessons · 12 modules · es/en

AI for developers

RAG, agents, evals and production LLMs. The next level.

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Your first line of code
is one click away

Free and in Spanish. Create your account and your progress follows you on any device.

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