The role of teachers and schools in explaining STEM outcome gaps.

We develop a novel methodology to explore the extent to which teacher and school assignments between fourth and eighth grade contribute to inequalities between advantaged and disadvantaged students-as defined by underrepresented minority (URM) status and eligibility for free or reduced-price lunch (FRL)-in their eighth-grade math and science test scores and high school math and science course-taking. We find that differences between advantaged and disadvantaged students in teacher and school assignments predict about 25% of the eighth-grade math test gaps, 10% of the eighth-grade science test gaps, and 35% of the gaps in advanced math course-taking. For science course-taking, school and teacher assignments predict about 20% of the URM gap and 10% of the FRL gap. While this methodology does not permit causal conclusions, the results are robust to analyses of a subsample in which students do not appear to be assigned to teachers based on prior test achievement.