Marcelo Galvani

The MIT OpenCourseWare offers free a large amount of material for students, teachers and interested (self-learners). It is not a course itself, but the material used in it. There are handouts, tests used, recommended books and in some cases videos.
The listing with courses ranging from anthropology to Nuclear Engineering.
Besides the above links the MIT [...]

Look at the various options for the language courses online at the site oculture.com
My favorite is the English as a Second Language
Good luck ...