Educators and policymakers are paying increased attention to the academic outcomes of students in the middle grades (i.e., Grades 6-8). One reform proposed to improve outcomes for these students is to replace middle schools (with Grade 6-8, 7-8, or 7-9 configurations) with K-8 schools. This longitudinal study evaluated the effects of continuously…

Seemingly endless tinkering and adjustment of the structure of education in the United States over the past century have led to the adoption of different school forms (grouping particular grades into separate schools) at different times. These different school forms necessitate transitions between schools (e.g., from a middle school to a high…