We analyze the impact of both pre-service preparation and in-service formal and informal training on the ability of teachers to promote academic achievement among students with disabilities. We employ rich student-level longitudinal data from Florida over a five-year period to estimate...

We examine the measurement and prediction of worker productivity using a sample of teachers and school principals. We find that principals' evaluations are positively associated with teachers' estimated contributions to students' test scores (value-added), and are better predictors of teacher...