Teachers matter. Nothing in a school day is more important for student achievement than the skills of teachers. Mathematica has a long history of studying how teachers are prepared for, supported, and perform in the classroom. Principals have also been shown to have an important influence on student achievement. Mathematica is studying intensive supports for principals and how they affect school, teacher, and student outcomes.
Evidence & Insights

Mathematical Learning Progressions: A Study of Teachers’ Content Adaptations and Alignment with Mathematical Learning Progressions
This study examines whether teachers’ content adaptations to middle school math curricula align with mathematical learning progressions and explores their motivations for adaptation.
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Kristin Hallgren
Director of Foundation and Nonprofit Partnerships, Education and Employment Division
View Bio PageEfficiency Meets Impact.
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