I've been watching Prof. Suskind (Stanford) do his GR lectures available on iTunes U and YouTube. While these lectures have a lot of problems, they appear to be about the only (free) online GR lectures that I've been able to find on the Internet. It's a shame that the Khan Academy doesn't do GR; I think that Sal Khan's GR lectures would be immensely better than Suskind's. It occurred to me that a series of GR lectures, if properly done & properly motivated, could be accessible to the more advanced high school student -- particularly if the lectures avoided the incredibly intimidating tensor notation. Suskind himself uses some pretty basic geometric examples, involving no more than hyperbolic sines & cosines. It's now been 100 years, and GR as a geometric theory has had all of the kinks worked out. I think that it is high time that GR be taught in high school as an extension of geometry -- probably in conjunction with spherical geometry to set up an analogy. There's no need for GR to be so mysterious that it is accessible to only 1% of the population. Note that I'm _not_ talking about quantum mechanics or the integration of quantum mechanics with GR; I'm merely talking about a classical geometry of curved spaces & times.