During July 1, 1992-June 30, 1999, a total of 323 school-associated violent death events occurred in the United States, resulting in 358 deaths. To guide prevention efforts, CDC examined school-associated firearm violent death events committed by students in elementary and secondary schools in the United States and determined the sources of the firearms used in these events. The findings indicate that, among the incidents for which data are available, the majority of the firearms used in these events were obtained from perpetrators' homes or from friends or relatives. The safe storage of firearms is critically important and should be continued. In addition, other strategies that might prevent firearm-related injuries and deaths among students, such as safety and design changes for firearms, should be evaluated.