This study draws upon survey and administrative data on over 9,000 teachers in 336 Miami-Dade County public schools over 2 years to investigate the kinds of collaborations that exist in instructional teams across the district and whether these collaborations predict student achievement. While different kinds of teachers and schools report different collaboration quality, we find average collaboration quality is related to student achievement. Teachers and schools that engage in better quality collaboration have better achievement gains in math and reading. Moreover, teachers improve at greater rates when they work in schools with better collaboration quality. These results support policy efforts to improve student achievement by promoting teacher collaboration about instruction in teams.

Policymakers have increasingly worked to combat teacher turnover by implementing induction programs for early-career teachers. Yet the existing evidence for the effects of induction on turnover is mixed. Drawing on data from the three most recent administrations of the Schools and Staffing and Teacher Follow-Up Surveys, as well as the Beginning Teacher Longitudinal Study, this study investigates whether different kinds of induction supports predict teacher turnover among nationally representative samples of first-year teachers. We find that receiving induction supports in the first year predicts less teacher migration and attrition, suggesting that using induction to reduce new teacher turnover is a promising policy trend. We also find that levels of induction support are fairly constant for different kinds of teachers and teachers in different kinds of schools. The exceptions are that teachers who are Black and who work in schools with more students who speak English as a second language report higher levels of induction supports.