SarahC: [...] Tracking and IQ tests will be done one way or another if the educational system is to perform any useful function at all. Nowadays these things are buried in pious rationalizations and baroque rituals, but they are still there, and they are essential for those parts of the system that actually work tolerably well. People in the academic establishment understand this perfectly well at the gut level, regardless of all the pious proclamations to the contrary (which I think are usually honest doublethink). As for these ideas not being scary, I can only repeat what JoshuaZ already said. Try discussing these things publicly without the usual pious rationalizations and see what the reactions will be. [...] They do matter, but less than commonly assumed. A great teacher can certainly be a crucial positive influence on a kid's life (and a bad teacher a negative one, of course). What needs to be recognized, however, is that while a good teacher can make kids interested in smart and useful things that are within their level of ability by making these things appear cool and fascinating, it's impossible to raise this level much. Moreover, contrary to the assumptions of the present system, it's impossible to select good teachers by formalized bureaucratic and credentialist procedures. Their ability is simply not amenable to formal bureaucratic evaluation, certainly not in a way that would be immune to Goodhart's law.