The also will do personalized calanders. I've bought a couple of them and the quality is very good. Links to every kind of on-line test you can think of. A wide array of classes on audio and video tape. I've never tried one of these yet, but many sound very interesting.
Prices seem reasonable, especially compared to college tuition.
On-line math courses in algebra, geometry, etc. Requires a registration, but doesn't cost anything. Math for Morons like Us On-line refreshers in algebra, geometry and calculus. ThinkQuest Library Collection of educational web sites.