Improving the teacher workforce is now high on the education policy agenda, and most policymakers draw on research to inform their positions about teacher quality. Many policymakers cite the "fact" that, in general, teachers don't improve their effectiveness after their first five years in the classroom. However, recent research shows…

Teacher teams are increasingly common in urban schools. In this study, we analyze teachers' responses to teams in six high-poverty schools. Teachers used two criteria to assess teams' goodness of fit in meeting the demands of their work: whether their teams helped them teach better and whether the team contributed to a better school. Their…

District- and state-level efforts to remake teacher evaluation systems are among the most substantial and widely adopted reforms that U.S. public schools have experienced in decades. Research on these next generation of evaluation systems has focused overwhelmingly on policy goals, program designs, and performance measures. However, still very…