What works in science and math education?
Until recently, there had been few solid answers — just guesses and hunches, marketing hype and extrapolations from small pilot studies.
But now, a little-known office in the Education Department is starting to get some real data, using a method that has transformed medicine: the randomized clinical trial, in which groups of subjects are randomly assigned to get either an experimental therapy, the standard therapy, a placebo or nothing.
The findings could be transformative...
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