There may indeed be a Platonic ideal of the one-size-fits-all school, but does not mean it is discoverable by central planners, especially central planners subj

There may indeed be a Platonic ideal of the one-size-fits-all school, but does not mean it is discoverable by central planners, especially central planners subject to the political incentives of the education establishment. So even though "Everyone is different" may be a canard, it may still be the case that the only practical way to improve schools is through a distributed process of trial and error on a diverse set of teaching methods.