Self-report surveys are used to track students’ social-emotional development. This large-scale panel survey reveals that self-efficacy, social awareness, and self-management decrease after Grade 6, except for growth mindset. Female students report higher self-management and social awareness but lower self-efficacy than males in middle and high school. Students of color and economically disadvantaged students report lower levels of each construct. Policymakers should consider these trends and use self-reports to target interventions and resources.