You should check out some of the courses on
http://www.udacity.com . They're nominally college courses, but my impression of them is that they're pretty accessible. Mostly math and computer science.
There are other sites around (coursera.org being my favorite) that also offer college-level courses online for free, but a lot of them require at least some previous knowledge, so YMMV. Coursera.org did just post one called "
How Things Work" that's supposed to be a good introduction to physics from a highly pragmatic approach and could be interesting.
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