Evidence that teachers' short-term instructional effects persist over time and predict substantial long-run impacts on students' lives provides much of the impetus for a wide range of educational reforms focused on identifying and responding to differences in teachers' value-added to student learning. However, relatively little research has…

Over the past 2 years, educational policy makers have focused much of their attention on issues related to teacher effectiveness. The Obama Administration has made teacher evaluation and teacher quality a central feature of many of its educational policies, including Race to the Top (RTTT), Investing in Innovation (i3), and the Teacher Incentive…

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…

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…