Explore by subject

Learning and tools

Courses and applications for working through a subject and practising it.

Books and projects

Books
The Word Machine
Understanding language models and putting them to work. Free PDF and EPUB in English and Brazilian Portuguese; paperback and Kindle in both languages.
Books
Your App Has to Work
From an AI prototype to a working application, with a team or on your own. Paperback and Kindle in English and Brazilian Portuguese; free PDF and EPUB in Portuguese and a separate online guide in English.
Projects
English ↔ Português
The language app I wanted for myself. American English and Brazilian Portuguese, with audio, visual vocabulary, and practice in both directions.
Projects
AI Academy
A course on how language models and the systems around them work. From the basic mechanism to RAG, infrastructure, and implementation.
Projects
Modern Python
A practical Python course with exercises, checkpoints, and a capstone project. Optional AI labs sit alongside the programming work.
Projects
Truck Driver English
English practice for truck drivers, built around the situations they face on the road: loading, inspections, dispatch, and roadside conversations.

I built the language app I wanted when I was learning Portuguese
I learned faster when words and context came before perfect grammar. So I vibe-coded a free English and Portuguese app around that idea.
July 12, 2026
I stopped trusting AI headlines, so I built a course
I went back to the papers and rebuilt the path from language-model mechanics to working systems. AI Academy is the map that came out of those notes.
August 20, 2026