Schools, peers, and media can influence child development in several ways. In schools, teachers encourage academic success and involvement, while school characteristics like size can impact anonymity and individualized learning. Peers aid socialization through play and modeling behaviors, both desirable and undesirable. Media provides messages that can influence cognition, behaviors, and beliefs, though content varies in its impacts - violence increases aggression while educational programs teach skills. Social-emotional theories examine how these factors shape social and emotional development.