This document defines bullying and the different roles involved: bullies use power to intimidate victims, while bystanders witness bullying but do not intervene. It identifies three groups - bullies, who intimidate victims; victims, who are forced to believe or do things; and bystanders, who watch without helping. The document provides links to videos about bullying and suggests ways to prevent bullying, such as bystanders speaking up for victims or choosing not to bully others.