The educational value of online courses has been debated for years, based on a large but uneven body of research. An analysis of 99 studies by the federal Department of Education concluded last year that online instruction, on average, was more effective than face-to-face learning by a modest amount. But that analysis has been challenged because so few of the underlying studies include apples-to-apples comparisons, reports the New York Times. Mark Rush of the University of Florida and colleagues tried to do just that by contrasting grades of students who sat through a semester of his live microeconomics lectures with...
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