Since the tragedy in Parkland, FL research from the Educator's School Safety Network has tracked a huge uptick in school-based violent incidents. 

30 days of data after Parkland: click the button to download the fact sheet.

While violent incidents or threats have occurred in 48 of the 50 states so far this school year, 10 states accounted for 48% of all the threats and incidents that have occurred so far. Twenty states account for more than 70% of all threats and incidents. In the β€œtop 10” states of concern, the number of threats and/or incidents is statistically significant for a number of reasons. These include the sheer number of incidents or threats, the type of events that occurred, and the total of events or incidents per capita, when compared to the population of the state.