Across the globe, schools are seen as an essential context for building socio-emotional capacities in adolescents, particularly for marginalized youth, who have been systematically and historically excluded from accessing opportunities and resources typically available to members of different social groups (Gil-Kashiwabara, Hogansen, Geenen, Powers, & Powers, 2007). However, despite this ideal, education has not yet reached its potential in promoting equal outcomes for all children andadolescents (American Psychological Association Presidential Task Force on Educational Disparities, 2012; Burkham & Lee, 2002; Gurria, 2016; Hampden-Thompson & Johnston, 2006). There exists a need to identify school practices that may enhance socio- emotional development and have implications for reducing disparities in academic achievement, educational attainment, and other indicators of well-being.

The aim of this dissertation, therefore, is to explore school and classroom practices that may be particularly effective in supporting the socio-emotional development of marginalized adolescents. I focus on two distinct populations: youth affected by violence in Colombia, and students of color within the United States. In Study 1, I explore whether three aspects of school climate – safety, connectedness, and services – buffer the negative implications of violence exposure for adolescent development in a Colombian sample. In Study 2, I determine how culturally responsive teaching practices in schools with high concentrations of students of color in the United States can be integrated into our current conceptualization of what constitutes high quality teaching, by examining profiles of teaching practices and associations between these profiles and teacher and classroom characteristics and student behaviors.

The adaptation and integration of the mainstream and ethnic culture are important processes to understand as they have been associated with immigrant and minority youth's adjustment and family dynamics. However, few studies focusing on youth's cultural experiences have explored youth's active role in their own cultural development, and even less have explored youth's role in influencing parents' cultural development. In the current dissertation, two studies addressed these issues by using a within-family longitudinal design to explore 246 Mexican American youth's role in their own and their families' cultural development. The first study examined the reciprocal associations in parents' and two offspring's cultural values to examine developmental differences in parent-youth socialization processes. Overall, the importance of mothers' values was highlighted as a significant predictor of increases in youths' values, five years later. In addition, Study 1 highlighted situations where youth play an active role in their parents' cultural development as youths' lower endorsement of respect for elders values was associated with increases in fathers' value endorsement, five years later. The second study explored the associations between youth's imitation and de-identification from parents and parent-youth incongruence in Mexican and Anglo cultural orientations. Youths' active role in their cultural development was underscored, as youths' reports of de-identifying from parents were linked to more incongruence in parent-youth Anglo orientations. Further, important family characteristics (i.e., parent-youth warmth and demographic similarities) were shown to predict youths' more imitation and less de-identification from parents.