No matter your feelings on TFA, it’s more than fair to say that their corps members fit this profile perfectly. On paper, they aren’t just “top third,” but top third of the top third. TFA cohorts enter the labor market having been among the highest achievers in the best colleges and universities in the nation. Getting accepted to the program is very, very difficult. Those who make it are not only service-oriented, but also smart, hard-working and ambitious. They are exactly the kind of worker that employers crave, and market-based reformers have made it among their central purposes to attract to the profession.
Yet, at least by the standard of test-based productivity, TFA teachers really don’t do better, on average, than their peers, and when there are demonstrated differences, they are often relatively small and concentrated in math (the latter, by the way, might suggest the role of unobserved differences in content knowledge). Now, again, there is some variation in the findings, and the number and scope of these analyses are limited – we’re nowhere near some kind of research consensus on these comparisons of test-based productivity, to say nothing of other sorts of student outcomes.
[...]
But, to me, one of the big, underdiscussed lessons of TFA is less about the program itself than what the test-based empirical research on its corps members suggests about the larger issue of teacher recruitment. Namely, it indicates that “talent” as typically gauged in the private sector may not make much of a difference in the classroom, at least not by itself. This doesn’t necessarily mean that market-based policies won’t lure great teachers, but it does suggest that, if we’re going to enact massive changes in personnel policy to attract a certain “type” of person to teaching, we might reexamine our assumptions on who we’re trying to attract and what they want.
Via.