A number of school districts across the United States have centralized choice plans. Students in these plans may opt to attend schools outside of their neighborhood, and schools may grant priority to students based on their distance to the school, whether a sibling attends the school and various other criteria. The high school assignment process in New York City and the comprehensive choice program in Boston have both recently changed their assignment algorithm inspired by the literature on assignment problems. The reforms in these districts have inspired new mathematical problems for the assignment literature which we will discuss in this talk.