Education is practically free these days. Just do a search on "open courseware", add a topic like "computer programming" or " mathematics" and start poking around to see what will work for you. Here are some resources we've found. We haven't delved into all of them, but I can recommend the Khan Acadamy and MIT from personal experience.
Khan Acadamy
PBS Learning Media
Free World U
MIT
Stanford
UC Berkeley google video youtube
Carnegie Mellon
Utah State
Tufts
Open Learn
John Hopkins
Rice University Connections
Sofia
University of Washington
University of Notre Dame
Wikiveristy
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