Bullying is a serious problem that affects many students. It can have lifelong negative impacts on both targets of bullying and bullies themselves. A substantial number of students in the US report being involved in bullying as bullies, targets, or both. Bullying is associated with many behavioral, emotional, and social difficulties. Schools need comprehensive anti-bullying policies and programs to address this issue through prevention, intervention, and support for all students involved - targets, bullies, and witnesses. Teachers play a key role through monitoring students, enforcing rules consistently, taking reports seriously, teaching skills, and offering support.