Free & Open Source
Learn AI & Machine Learning
from scratch.
30 interactive lessons with animated diagrams and hands-on simulations. No prerequisites. Go from "what is AI?" to building production systems.
30
Lessons
5
Levels
30+
Simulations
100%
Free
Your learning journey
Progress through 5 carefully designed levels
1
Foundations
6 lessons
2
Deep Learning Core
6 lessons
3
LLMs & Modern AI
6 lessons
4
Production
5 lessons
5
Agents & Frontier
7 lessons
1
Foundations
6 lessons
2
Deep Learning Core
6 lessons
3
LLMs & Modern AI
6 lessons
4
Production
5 lessons
5
Agents & Frontier
7 lessons
Start here
Popular lessons to begin your journey
Foundations
What is AI & Machine Learning?
The big picture — types of AI, how machines learn
Start →
Deep Learning Core
Neural Networks & Backpropagation
Perceptrons, layers, how a network learns step by step
Start →
Agents & Frontier
Agents & Reasoning
ReAct, chain-of-thought, planning, tool use, function calling
Start →