It seems that everywhere I turn these days, there’s another book or article reproaching our reliance on averages, and, by extension, the “gold standard” of scientific research–the randomized controlled trial (RCT)–in education. The two concepts are intertwined, since RCTs rely on both random assignment as well as averages (or means) as the statistic of importance in order to minimize bias and maximize our ability to reject or not the “null hypothesis” (the default assumption that our intervention did not make a difference to those who received it).
http://www.brookings.edu/blogs/brown-center-chalkboard/posts/2016/07/07--really-end-average-mohammed
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