Study confirms link between school climate and violence

"School violence is a very important social issue world-wide. It poses a significant threat to the health, achievement, and well-being of students. Although the most highly published incidents involve serious physical violence, less serious forms of physical aggression and psychological violence (including harassment, bullying, and relational aggression) present far more prevalent and persistent problems...."
http://medicalxpress.com/news/2013-04-link-school-climate-violence.html