Most research on equal educational opportunity has focused on inputs like teacher experience and degrees. This brief estimated teachers’ value added (contribution to student achievement growth) and measured access to highest-performing teachers in high- and low-poverty schools. Across 10...

Most research on equal educational opportunity has focused on inputs like teacher experience and degrees. This brief estimated teachers’ value added (contribution to student achievement growth) and measured access to highest-performing teachers in high- and low-poverty schools. Across 10...

Educators and policymakers have long debated which textbooks and their associated instructional approaches have the greatest impact on student learning in key subjects. Mathematica’s large-scale federal study of the effectiveness of four early math programs brings new clarity to what works in...