This study explored the nature and extent of middle school students' (n = 665) experiences with cyber bullying. Approximately one in five students reported being cyber bullied in the past year, with 55% of those students being repeatedly victimized within the past 30 days. Female students were more likely to be involved in cyber bullying (victim, bully, and witness) compared to male students. One aspect of this study involved an examination of student disclosure and the consequences to victims and witnesses when informing others when they were affected by cyber bullying. Approximately 64% of youth reported the incident when they were cyber bullied and 60% reported when they witnessed cyber bullying. Peers and parents were told most frequently, while teachers were rarely informed. The likelihood of the cyber bullying behavior terminating was not influenced by the group informed of the incident. Overall, neither peers nor adults were very effective in assisting youth to reduce the cyber bullying behavior. These results suggest that peers, parents, and school personnel need to be prepared to offer more helpful strategies to youth who are involved in cyber bullying as victims, perpetrators, and witnesses. The common suggestion that youth report bullying behavior loses some of its credibility when those who do report do not receive helpful advice. (Contains 3 tables.)