1) The document summarizes research on building community and sense of belonging for youth. It discusses how connectedness to families, schools, and communities leads to better health outcomes and less risky behaviors for adolescents. 2) Positive youth development programs that provide a supportive environment for youth have shown small benefits for academic achievement and psychological adjustment compared to programs focused solely on activities. 3) Community interventions like parenting programs that encourage collaboration and mutual support between community members have been associated with positive outcomes for families and youth.