It’s impossible to learn very much by simply sitting in a lecture, or even by simply doing problems that are assigned.
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I think, however, that there isn’t any solution to this problem of education other than to realize that the best teaching can be done only when there is a direct individual relationship between a student and a good teacher — a situation in which the student discusses the ideas, thinks about the things, and talks about the things.
— Feynman Lectures on Physics
— Richard P. Feynman
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2007.12.27