MIT University has posted free lectures on the Web
One of the best technological universities in the world has published most of its training courses, lectures and seminars on the Internet on a separate resource.
There are audio and video courses, search by catalog, by course number, by discipline name, all subjects and degree of difficulty are divided into separate headings. ')
So, if there are no problems with English, all materials are here at MIT OpenCourseWare . For those who do not fully speak English, there are even courses that have been specially translated (although Russian is, alas, not: there are Asian languages for students from China and developing Arab countries).
In general, probably not a single university has made such a breakthrough in terms of open and free publication of educational materials on the Internet. So hurry to use.