Assistant teachers are an integral component of the preschool classroom, planning and implementing educational activities and supporting individual children and small groups, and often bring linguistic, cultural, and racial/ethnic diversity to the teaching field. However, there is limited research on the impact of assistant teacher qualifications…

Federal incentives and requirements under the Obama administration spurred states to adopt major reforms to their teacher evaluation systems. We examine the effects of these reforms on student achievement and attainment at a national scale by exploiting their staggered implementation across states. We find precisely estimated null effects, on…