The prestigious American university - Yale - has seven departments taking part in an open, free to users programme. Astronomy, English, philosophy, physics, political science, psychology and religious studies are the seven departments.
It's great for students who are looking to build on their studies, or for parents seeking to expand their knowledge, or for teachers as it brings you face to face with Yale's top lecturers.
There are video and audio materials and supplementary transcripts to assist your learning. The structure, reading notes and homework assignments are just the same as any other student on campus would be given, making the lessons as authentic as possible.
I had a look at a lecture on World War 1 poetry, for instance, under the English department and enjoyed the video lecture.
If you want to have a look just click on the Yale site in my links section to the left.