MIT is one of several schools that offer classes through edX, which provides free online courses in partnership with some of the country's top universities. Joe Raedle/Getty Images hide caption

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Val James of the Toronto Maple Leafs takes warmup prior to a preseason game against the Boston Bruins at Maple Leaf Gardens in Toronto, Ontario, Canada, in 1986. Graig Abel Collection/Getty Images hide caption

itoggle caption Graig Abel Collection/Getty Images