Bullying is a prevalent and growing problem in American schools, impacting students of all ages and backgrounds. Bullying is defined as "unwanted, aggressive behavior among school-aged children that involves a real or perceived power imbalance. The behavior is repeated, or has the potential to be repeated, over time." Students are bullied for diverse reasons, including physical appearance, such as being overweight; the way they dress; or unchangeable factors, such as gender, sexual orientation, race, ethnicity, or religion. This article begins by discussing the types and frequency of bullying. It goes on to address the impact of bullying; students at risk of being bullied; bullying of South Asian, Hindu, Sikh, Arab, and Muslim students; classroom discussions and bullying; teacher bias; addressing the problem: bullying prevention; and addressing teacher bias.