MIT resources:
http://ocw.mit.edu/high-school/physi...tic-induction/
... + other topics: have a play.
(A lot of colleges have been putting their course-notes online.)

The Feynman lectures are available in a torrent - though I don't think they will be out of copyright and I don't know the terms.

There's quite a few pdf's for gratis and even cc download within an easy google and they look very similar. Which level are you looking for?