Using data from the School Survey on Crime and Safety (SSOCS), this report presents findings both on crime and violence in U.S. public schools and on the practices and programs schools have used to promote school safety. SSOCS collects data from public school principals about violent and nonviolent crimes in their schools. The survey also collects data on school security measures, school security staff, mental health services, parent and community involvement at school, and staff training. SSOCS data can be used to study how violent incidents in schools relate to the programs and practices that schools have in place to prevent crime. The purpose of this report is to introduce the data by presenting selected descriptive information from SSOCS:2020. The tables in the report contain totals and percentages, which have been weighted to represent U.S. public schools. The report also includes selected findings and figures. Together, the tables, findings, and figures show the range of data available from the survey rather than a full review of all observed differences. [For the full report, see ED621593.]