This document discusses bullying and its effects on children. It defines bullying as unwanted aggressive behavior such as threats, rumors, attacks, and exclusion. There are four main types of bullying: cyber, social, verbal, and physical. Bullying has many negative short-term and long-term effects on children, including depression, low grades, and suicidal thoughts. The document provides tips for parents and teachers to prevent bullying and advice on what to do if a child is being bullied.