This study examined the impact of various school-related factors on adolescents' depressive mood, including prosocial behavior, verbal aggression, and relationships with teachers. The data used in this study were collected in the context of a larger survey on victimization in secondary schools from the French Community of Belgium. Participants were 2896 secondary school students (1520 males; 1376 females) aged 12-18 years. Results showed that for both genders, the three strongest predictors of depressive mood were age, feeling of exclusion, and verbal aggression. This study focusing on school-related predictors of depressive mood confirmed the importance of the social context in school as a predictor of depression in both girls and boys. (Contains 2 tables and 3 figures.)