“Various factors condition the effectiveness of these different approaches. For example, social development programs that emphasize social skills are among the best strategies for preventing violence among young people – but appear to be more effective when organized among preschoolers and elementary school students than among high school students.”
Source, WHO, World Report on Violence and Health, pp. 206-208.
Social development programs – including physical harassment prevention and preschool initiation:
“These programs aim to improve school performance and social relationships. Social development programs especially are designed to give children and teenagers social skills and teach them anger management, conflict resolution and moral building.”
Source, WHO, World Report on Violence and Health, Executive Summary, p.25.