| 1 Includes auditoriums, bathrooms, cafeterias, entryways, gyms, offices, and other locations inside the school building. |
| 2 Includes courtyards. |
| 3 Includes both inside and outside on school property, outside on school property, and other locations outside school. |
| 4 Includes after school, before school, in the evening, at night, not a school day, school events, the start of school, sport events, and unknown time periods. |
| NOTE: "School shootings" include all incidents in which a gun is brandished or fired or a bullet hits school property for any reason, regardless of the number of victims (including zero), time, day of the week, or reason (e.g., planned attack, accidental, domestic violence, gang-related). This table was created using a database that aims to compile information on school shootings from publicly available sources into a single comprehensive resource. For information on database methodology, see K-12 School Shooting Database: Research Methodology (https://www.chds.us/ssdb/resources/uploads/2020/09/CHDS-K12-SSDB-Research-Methods-Sept-2020.pdf). Due to school closures caused by the coronavirus pandemic, caution should be used when comparing 2019-20 data with data from earlier years. Some data have been revised from previously published figures. |
| SOURCE: U.S. Department of Defense, Naval Postgraduate School, Center for Homeland Defense and Security, K-12 School Shooting Database, retrieved September 28, 2020, from https://www.chds.us/ssdb/. (This table was prepared October 2020.) |