The Rolla Daily News
An article here provides some statistics from the Division of Violence Prevention, National Center for Injury Prevention and Control, Centers for Disease Control.
As found in the article: “School associated violent deaths are rare — 17 homicides of school-age youth ages 5 to 18 years occurred at school during the 2009-2010 school year and of all youth homicides, less than 2 percent occur at school, and this percentage has been stable for the past decade.”
Follow the link for more statistics.