Discovery Streaming, and yet this free educators website from National Geographic is going to be infinitely useful for educators.
They have done a good job of segmenting their views by audience. Teachers, Informal Educators, Families, Students, Kids all have their own view. This is smart.
They also have a lot of free tools for educators and a very interesting Geography Alliance to promote Geography literacy and some useful material on the Japanese earthquake.
The more non-fiction multimedia companies do to organize resources, share, and help those with common learning interests network - the better off we'll all be.