1. In the 2009-2010 school year, there were 1.9 million nonfatal crimes committed at school, ranging from assault to theft.
2. 37% of US students reported the presence of gangs in their schools.
3. 1 in 12 teens in high school are injured or threatened with a weapon each year.
4. 77% of students are bullied mentally, verbally, or physically.
5. Young people who bully are more likely to smoke, drink alcohol, and get into fights.
6. Middle school students are more than twice as likely as high school students to be affected by school violence.
7. About 8% of eighth graders stay home at least once a month to avoid a bully.
8. Revenge is the strongest motivation for school shootings.
9. From July 1, 2009 through June 30, 2010, there were 33 school-associated violent deaths in elementary and secondary schools in the US.
10. Nearly 50% of homicide perpetrators gave some type of warning signal, including making a threat or leaving a note, prior to the event.
11. Most school-associated violent deaths occur during transition times – before and after the school day and during lunch.

Sources:
Centers for Disease Control and Prevention [1]

Constitutional Rights Foundation [2]

US Department of Justice [3]

National Center for Education Statistics [4]