Kriston, that is so great that you buy them for your self. The course descriptions do sound so interesting, it is like a candy store for the brain.
I have an easier time justifying the expense if it is tied to DS's education. LOL But in secrete I am looking forward to watch some of these as well.
I think DS would love the one on Abraham Lincoln, the astronomy and math....hm, what else...

Lmom, yes that is the one. DS had the president obsession for a while. One time we went on a long driving trip, and that was his choice for the car ride. Needless to say, it was very educational even for the driver.
We don't have cable, so we depend lot on PBS and local libraries. I will check the Mathematics by A.T. Benjamin.

Thanks again Kriston for pointing out such resource.