School bullying is a type of bullying that occurs in connection with education, either inside or outside of school. Bullying can be physical, verbal, or emotional and is usually repeated over a period of time. School shootings have focused attention on student bullying, with shooters in several of the worst shootings reporting they were bullied. Studies prompted by the shootings have shown long-lasting emotional harm to victims. The studies also revealed that bullies themselves are likely to suffer problems as children and adults.