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Khan Academy - not sure how far 'post school' it goes though. Try the exercises, definitely good for a refresher at least.

• taliesinb 15y ago
  It doesn't go very deep at all -- I've checked. It is pretty wide, though.
• taliesinb 15y ago
  Probably not a bad place to start is just iTunes U. There is some pretty cool stuff curated there -- I'm just delving into Andrew Ng's machine learning course.