Examines several nationally representative senior high school student cohorts between the early 1970s to early 1990s to understand trends in the mathematics scores of these different racial-ethnic groups. 450-character abstract: Examines trends in the mathematics scores of different racial-ethnic groups over time and analyzes how changes in family, school, and schooling measures help explain changes in the test score gaps. Although there were few positive changes between schools, the within-school experiences of black and Latino students changed for the better compared with white students when measured by student self-reported academic track placement.