“[T]hings have improved dramatically over the last couple of decades. During the 2013-14 school year, there were three non-gang, non-suicide killings at universities, and three more at K-12 schools.
The National School Safety Center, a good source of statistics, started collecting data on K-12 violence in the 1992-93 school year. During the first five years, from 1992-93 to 1996-97, there were 26.8 gun murders per year on K-12 and university school property. In contrast, during the last five school years, 2009-10 to 2013-14, the average was 12 – a 55 percent drop.”
– John Lott