While in-service teacher training programs are designed to enhance the performance of several cohorts of students, there is little evidence on the persistence of their effects. We present the two-year results of a large-scale, randomized study of an intensive in-service teacher training program...

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...