Even as research has begun to document that teachers matter, there is less certainty about what attributes of teachers make the most difference in raising student achievement. Numerous studies have estimated the relationship between teachers' characteristics, such as work experience and academic performance, and their value-added to student…

Researchers and policymakers often assume that teacher turnover harms student achievement, but recent evidence calls into question this assumption. Using a unique identification strategy that employs grade-level turnover and two classes of fixed-effects models, this study estimates the effects of teacher turnover on over 600,000 New York City 4th…

Even as research documents that teachers matter, there is less certainty about the attributes of teachers that make the most difference in raising student achievement. Many studies have estimated the relationship between teachers' characteristics (i.e., experience and academic performance) and their value-added to student achievement. Few have…