Bullying is abusive behavior by one or more students against a victim or victims. It can be a direct attack -- teasing, taunting, threatening, stalking, name-calling, hitting, making threats, coercion, and stealing -- or more subtle through malicious gossiping, spreading rumors, and intentional exclusion. Both result in victims becoming socially rejected and isolated.

Boys tend to use physical intimidation or threats, regardless of the gender of their victims. Bullying by girls is more often verbal, usually with another girl as the target. Cyber-bullying by both boys and girls -- in online chat rooms, e-mail, and textmessaging -- is increasing.