Bite-Sized Chunks
15 courses · 37,511 bite-sized lessons

Learn anything,
one small chunk at a time.

AI-tutored micro-lessons across CS, machine learning, math, the web stack, cloud, security and more. ~300 words each. No filler. Honest difficulty curve.

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First 10 lessons of every course are free — no sign-up required.

Why Bite-Sized Chunks

Tiny lessons, real depth

Every lesson is ~300 words and teaches exactly one concept. Read in 2 minutes, remember it forever.

Honest curriculum

Lessons build on each other. The tutor only uses concepts you've already learned — never previews future material.

Powered by the best models

Lessons are written on demand by frontier AI models — and cached so the next reader gets them instantly.

All courses

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Foundations

Mathematics

3,121 lessons
Beginner

The mathematical foundations every engineer should know.

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Computer Science

2,872 lessons
Intermediate

From bits to algorithms — the core of how computing works.

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Programming Languages

JavaScript

2,723 lessons
Beginner

The language of the web — variables, functions, async, and the DOM.

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Python

1,289 lessons
Beginner

Bite-sized Python lessons from foundations to advanced topics.

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Java

2,870 lessons
Intermediate

A practical, modern path through the Java ecosystem.

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TypeScript

1,796 lessons
Intermediate

Type-safe JavaScript: generics, inference, and scalable codebases.

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Web Development

Web Development

2,982 lessons
Beginner

HTML, CSS, and how the browser turns code into pages you can ship.

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React

2,396 lessons
Intermediate

Build modern, component-driven user interfaces.

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Software Engineering

Software Engineering

1,933 lessons
Intermediate

How real-world software gets designed, built, and shipped.

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System Design

1,919 lessons
Advanced

Design scalable, reliable distributed systems.

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AI & Data

Data Science

2,145 lessons
Intermediate

Wrangle, visualize, model, and tell stories with data.

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AI Engineering

1,886 lessons
Advanced

Build production AI systems with LLMs, RAG, agents, and evals.

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Machine Learning and Deep Learning

3,538 lessons
Advanced

Models, math, and neural networks from first principles.

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Infrastructure & Security

Cloud and Infrastructure

2,989 lessons
Intermediate

AWS, GCP, Azure, containers, and infrastructure as code.

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Security

3,052 lessons
Intermediate

Threat models, cryptography, and defensive engineering.

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Simple pricing

Try any course free for 10 lessons. Subscribe to unlock everything.

Monthly

$9/mo

All courses, all lessons.

Save 9%

Yearly

$99/yr

Save 9% vs monthly.

Best value

Lifetime

$499 one-time

No subscription. Includes course PDFs.

See pricing details