Following high-profile school shootings, policymakers and educators seek ways to prevent such shootings, but there has been little research on school-level responses in the immediate aftermath of such events. This study examines how school-level security measures and practices changed after the 1999 Columbine shooting using a nationally…

The present study examined variations in incidents of student insubordination and violence using an individual change model, which allowed for repeated observations of student behaviors in 148 Ohio schools at the initial status (2010) and over time (2010 and 2014). Findings were significant only at the initial status. As school size and total…