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I really enjoyed the Gilbert Strang videos on linear algebra back when I was taking the course at McGill: http://ocw.mit.edu/courses/mathematics/18-06-linear-algebra-...

He has an exceedingly dry sense of humor. It's quite nice, when you're 40 minutes into an involved lecture. The series is indeed worth the watch.

Yes, very entertaining and enlightening (even if you already know the subject). Love Strang's teaching style.

I agree, his lecture deriving the determinant from a few desirable properties is a classic in my mind.