The USA has the highest number of school-related shootings. These shootings are generally categorized into mass shootings as there is always multiple casualties. Lack of family supervision, family dysfunction, mental illness and other psychological issues, easy access to firearms and more are often stated as a cause of the shootings that occur at school or educational premises. In most of the cases it has been recorded that the shooter is either a former or a current student.

Students that are often bullied and threatened sometimes tend to get revengeful leading to these crimes. Even suicidal tendencies, depression and other mental health issues are highly sought after reasons after which the shooter takes such steps.