The data in this report are from the 2003-04, 2005-06, 2007-08, 2009-10, 2015-16, and 2017-18 administrations of the School Survey on Crime and Safety (SSOCS). SSOCS is a nationally representative sample survey of public elementary and secondary schools in the 50 states and the District of Columbia. The survey asks principals about the prevalence of crime and violence in their schools, as well as the practices and programs their schools have in place to promote school safety. Specifically, principals are asked whether their school allows certain disciplinary actions, including expulsion from school, and, if so, whether these actions were used during the current school year.