The main section is organized around the contexts in which adolescents grow up - families and neighbourhoods, peer groups, schools, youth groups and recreation groups, workplaces, religious organizations, health centers, youth courts, cyberspace. Each chapter explores the application of youth development principles to its context, drawing on current research. The next section addresses evaluation, funding, and community-wide initiatives. The concluding chapter identifies multidisciplinary themes, including youth participation, mentoring, universal versus targeted approaches, diversity, and evidence-based practice.