The document summarizes research on school diversity and integration policies in four cities: Houston, TX; St. Louis, MO; Berkeley, CA; and additional sources. It provides background on the demographics, political leanings, and responses to integration of each city. For Houston, it describes magnet school programs and a lawsuit that changed admissions policies. In St. Louis, it discusses a desegregation program and perspectives on integration. Berkeley is noted as a model of integration using neighborhood-based assignments. Unanswered research questions are also listed.