They link to a paper which states that sorting benefits both high and low-performing students. However, it helps high-performing students more, which may explai

They link to a paper which states that sorting benefits both high and low-performing students. However, it helps high-performing students more, which may explain why sorting has been unpopular in the last few decades. People are so into 'equality' they end up being in favor of results where everyone does worse if there's a smaller spread, i.e. more 'equal'. This way they can say they closed the 'gap' or something like that. Helping bright students excel is almost 'undemocratic'. http://www.nber.org/papers/w18848 http://www.nber.org/papers/w18848