Learn
Build the foundation first
Eight complete courses teach the ideas before asking you to use them.
Choose where you want to start.
Learn a concept, practise it, or apply it in realistic work.
New to CodeBaobab?Free
Begin with Big O notation
It is the first Algorithms lesson and gives you the language used to compare solutions throughout the app.
Practise
Turn the lesson into a skill
Work through runnable problems with checks, explanations, and saved progress.
Apply
Use the skill in realistic work
Move beyond short questions into code, technical discussion, and a complete project.
Want to look beyond the free collection?
Every Pro course and project has a readable preview, so you can inspect the teaching style and scope first.