We examine earnings records for more than 130,000 classroom teachers employed by Florida public schools between the 2001-2 and 2006-7 school years, roughly 35,000 of whom left the classroom during that time. A majority of those leaving the classroom remained employed by public school districts. Among teachers in grades 4-8 leaving for other…

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…