Free courses
Free CTXBOOK courses designed to show how interactive reading helps you learn.
Photography Basics
Exposure, composition, lenses and light explained in an interactive format.
AI Vocabulary
Understand prompts, LLMs, tokens, hallucinations and everyday AI language.
English Through Context
Learn useful words and phrases by reading short texts with explanations.
How it works
CTXBOOK turns a static lesson into a guided reading experience.
1. Read the lesson
The material stays readable, calm and focused — like a good article or textbook.
2. Click difficult terms
Explanations appear instantly without leaving the text or opening another page.
3. Understand faster
Complex words, concepts and visual context become easier to remember.
4. Continue learning
Courses can include PDFs, CTXBOOKs, revision materials and tests.
For schools and creators
CoursesABC can host learning packs created with Contextero.
Schools
Publish materials for students in multiple languages and make difficult texts easier to understand.
Creators
Turn your knowledge into interactive CTXBOOK courses and share them with your audience.