Holding a college major in education is not correlated with effectiveness in elementary and middle school classrooms, regardless of the university at which the major was earned. Teachers do become more effective with a few years of teaching experience, but (except in elementary reading) no gains--and some declines--in effectiveness appear in the…

We study the effects of various types of education and training on the ability of teachers to promote student achievement. Previous studies on the subject have been hampered by inadequate measures of teacher training and difficulties addressing the non-random selection of teachers to students and of teachers to training. We address these issues by…