Yale is one of the USA’s top universities, and they have a great selection of lectures and materials from their own courses on offer for free online. No registration is required – each course includes a series of video lectures and other problem tasks, further reading suggestions etc. Options range from African-American History to Geophysics to Cellular Biology to Portuguese Language, with lots in between. If you like these short university style courses, you could also check out edX, FutureLearn and Coursera.

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