as a kid we had some good school trips, the beach, mountains, wildlife parks.. that sort of thing. Don't remember them being terribly educational, but fun ;) My kids trips have been more museums and such... there are several good ones run by texas tech (including Lubbock Lake) so at least they don't have to travel very far.

The summer classes are a different subject weekly... things like ecology, map making, learning about & making primitive tools, learning about the first pioneers as well as native americans and learning about indigenous instruments & creating their own. I know they do some digs with the kids as well, but I'm not sure what ages those are for.