A man killed his wife along with 30 elementary kids using bombs along with 8 other victims.
Two students and one teacher killed, one other wounded when 14-year-old Barry Loukaitis opened fire on his algebra class.
Four students and one teacher killed, ten others wounded outside as Westside Middle School emptied during a false fire alarm. Mitchell Johnson, 13, and Andrew Golden, 11, shot at their classmates and teachers from the woods.
One student killed in the parking lot at Lincoln County High School three days before he was to graduate. The victim was dating the ex-girlfriend of his killer, 18-year-old honor student Jacob Davis.
Two students killed, 22 others wounded in the cafeteria at Thurston High School by 15-year-old Kip Kinkel. Kinkel had been arrested and released a day earlier for bringing a gun to school. His parents were later found dead at home.
14 students (including killers) and one teacher killed, 23 others wounded at Columbine High School. Eric Harris, 18, and Dylan Klebold, 17, had plotted for a year to kill at least 500 and blow up their school. At the end of their hour-long rampage, they turned their guns on themselves.
One teacher, Barry Grunow, shot and killed at Lake Worth Middle School by Nate Brazill, 13, with .25-caliber semiautomatic pistol on the last day of classes.
James Sheets, 14, killed principal Eugene Segro of Red Lion Area Junior High School before killing himself.
A 15-year-old student shot and killed Weston School principal John Klang.
This was the deadliest gun massacre by a single man in U.S. History. 32 were killed and 17 were wounded.