This study examines how social-emotional skills develop from Grade 4 to Grade 12 and vary by gender, socioeconomic status, and race/ethnicity. Based on self-report student surveys administered to around 400,000 students in California, the study finds that social-emotional skills do not increase uniformly and vary across subgroups. Females have higher social awareness but lower self-efficacy than males. Economically disadvantaged students show improvement in high school. White students report higher social-emotional skills than African American and Latinx students.

California and the US are undergoing a cultural shift in school accountability policies towards locally-determined measures of school performance. Lessons can be learned from the CORE districts, which developed an innovative accountability system, emphasizing support over sanctions, and utilizing multiple measures of school quality. The CORE districts' measurement system and collaboration hold promise for improving local systems, but efforts to build capacity remain a work in progress.