"If the Internet is not free, fair, and open, then our ability to effectively address climate change, or economic injustice, or racism, or what have you, is severely curtailed, if not made impossible. Although the Internet might not be the most important fight we have, it's going to be the foundational fight."
-- Corey Doctorow
by Brad Miller and David Ranum, Luther College (as remixed by Jeffrey Elkner)
by Mark Guzdial and Barbara Ericson
Hands-on introductory computer programming using Python 3.
by Peter Wentworth, Jeffrey Elkner, Allen Downey, and Chris Meyers
An introductory computer science text book using Python.
by Tony R. Kuphaldt
A free series of textbooks on the subjects of electricity and electronics