About 65% of U.S. K-8 students switch schools at least two times between kindergarten and eighth grade, increasing their risk of academic decline and contributing to instability in school district enrollment and finances (U.S. Government Accountability Office, 2010; Welsh, 2017). Yet, non-routine moves, which occur when a student switches schools when they do not move residences or grade out of the school, are made possible by state and local policies that allow students to attend schools outside their residential attendance zones. While school choice policies have the potential to provide greater educational opportunities for students in low performing schools (Eckes & Trotter, 2007;Frankenberg & Lee, 2003), they may also exacerbate segregation by race and class, as patterns of student mobility may reflect racial or