College on line

I "audit" podcasts from UCSD and Yale and Berkeley. Some are on itunes U, and others on youtube.

then there is Khan academy for high school math, and expanding into finance and history.

There are a lot of medical lectures on various sites (I pay for Audiodigest, and alas most of the medical journals want you to pay for them, but there are a lot of free sites out there).

I am aware that there are religious studies on line, but haven't looked into them, since they, like a lot of old fashioned correspondence courses, cost money.

Now, welcome to Mythgard Institute.

Get an MA in English... alas, even to audit takes money. Sigh. But if you are interested in MiddleEnglish/Tolkien studies, check it out.