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...

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...