I have some videos on mathematics, some of which are
basic and some are a little more difficult. I like the
one about the life of Georg Cantor. He was driven by
a desire to understand the meaning of infinity. He found
that some infinities are not "countable" which implies that
one type of infinity is "bigger" than another type. Quick
son - get the prozac!
Also check out the video titled " Microsoft Mathematics 4.0"
a free graphing calculator for your computer.
I got my copy of the program - it is pretty cool, and it's free.

Georgie Cantor and his beloved infinties>

Microsoft Mathematics 4.0 free graphing calculator>