I thought to myself you can’t introduce a “Education” tab without mentioning two of perhaps the most famous free online academies: Kahn Academy and Open Course Ware at MIT. Khan Academy, http://www.khanacademy.org/, offers mainly high school level courses but they do have some advanced stuff to include some course ware in computer science (python programming). MIT, http://ocw.mit.edu/ on the other hand offers advanced collegiate level courses. Both offer upwards of 200+ courses which can be used to brush up on some rusty items or to learnn something new.
I know niether of these are Information Security (infosec) related but they have excellent stuff. Don’t worry I will include infosec items too,