Sociopolitical development refers to the processes by which an individual acquires the knowledge, skills, and commitment to analyze and challenge oppressive social forces. A growing body of scholarship reports that high levels of sociopolitical development are predictive in adolescents of a number of key outcomes including resilience and civic engagement. The present study explored the role that urban secondary schools can play in fostering adolescents' sociopolitical development through a longitudinal, mixed-methods investigation of more than 400 adolescents attending "progressive" and "no-excuses" high schools. Analyses revealed that, on average, students attending progressive high schools demonstrated meaningful growth in their ability to critically analyze racial and economic inequality, while students attending no-excuses high schools demonstrated meaningful growth in their motivation to challenge these inequities through activism. Qualitative interviews offered insight into youth's perceptions of the programming and practices at their respective schools that contributed to their sociopolitical development.