Since our founding, volunteers have written about 50,979 modules in a multitude of textbooks.
The central place to ask questions or discuss ideas is the Staff Lounge (this is the equivalent to Wikipedia's Village Pump.
What to do
Wikipedians may wish to read our primer before getting started). See also the mailing list.
Explore, be bold in editing pages, play around in the sandbox, have fun, and good luck!
Some Featured Books
Ada Programming is a tutorial teaching the Ada programming language. Ada puts unique emphasis on, and provides strong support for, good software engineering practices that scale well to very large software systems (millions of lines of code, and very large development teams).
Human Physiology explains, system by system, the workings of your body. It is intended as an understandable undergraduate-level guide to how the body systems function at a cellular level and how they work together to maintain a favorable environment for your cells. You and your class are invited to use and improve this book!
Control Systems is an inter-disciplinary engineering text that analyzes the effects and interactions of mathematical systems. This book is for third and fourth year undergraduates in an engineering program.
Special Relativity is an introductory text for physics undergraduates and advanced high school students. It is also approachable by the educated layman. It is carefully designed to tackle the physics of simultaneity.