Intro to Python as an interactive online book
Another interactive online book on how to program
Run programs right from the Web site and take quizzes. It uses Python’s turtle module
A great example of one of the best uses of robots.
Bret Victor has created quite a stir lately with his talks and tools to help people learn how to program.
Here is an incredible essay in which he talks about designing a system to understand programs
This category concerns computers, the use of computer applications, computer programming, the Internet, and other computer-related topics taught in schools. It also concerns computer peripherals
A Website from the robots folks that talks about Arduino projects for robotics including using Arduinos with Lego Mindstorms
Lots of good info on this site!