MIT OPEN COURSEWARE, is a site containing all MIT course content (about 1800 courses). OCW started in 200 and in 2002
offered 50 courses, and now is offering around 1800 courses. OCW is a free publication of MIT course materials, but: OCW is not an MIT education, not grant negrees or certificates, not provide access to MIT faculty.
You can find courses through the ‘Courses’ page where you have a different matters, and download courses you are interested in. There are courses translated. OCW receives 1 million visits per month and the audience is divided among students, educators and self-learners.
It is not neccesary registration and you cannot get a certificate, but it is possible to work through the materials at your own pace, and in whatever manner you desire.