On April 20,1999, teenagers Eric Harris and Dylan Klebold gunned down there classmates and teachers at Columbine high school killing 13 people and wounding 20 otheres.
Another school shooting was the Virginia tech massacre in April 16 2007.A maned named Seung Hui Cho went to the Polytechnic institute and killed 6 people including himself
On December 14, 2012, 2O- year old Adam Lanza shot and killed his mother then he grabbed an Ar-15 and two pistols and headed to Sandy Hook Elementary where he killed 20 students and six teachers before committing suicide.
After Adam killed all of the kids he went to a boys bathroom where he turned the gun on himself and shot himself in the head.
In Bakersfield California one kid shot up a school bus filled with 10 special needs students. Luckily it was a bb gun and only the bus driver got hurt because of the broken glass shattered from the windows.
The most recent school shooting was in Texas. His name was Dimitrios Pagourtzis and he smuggled two guns under his coat one was a 38 revolver and the other was a shotgun.He ended up killing 10 people and wounding 10 others with serious injuries.