YouTube is also incredible for educational stuff. There's very pop science, pop science, hard science, and then things like hundreds of lectures from Leonard Susskind on everything from classical mechanics to the latest happenings in string theory/m-theory.
Phenomenal stuff, but it seems like the things that most places (universities in particular) are still holding out on are things like problem sets. Hard to know how little you know until you have materials challenging your depth of understanding. Watching a lecture without doing associated problems is like trying to learn to play basketball without touching a basketball.
Phenomenal stuff, but it seems like the things that most places (universities in particular) are still holding out on are things like problem sets. Hard to know how little you know until you have materials challenging your depth of understanding. Watching a lecture without doing associated problems is like trying to learn to play basketball without touching a basketball.