These are the supplemental tables for the report, "Crime, Violence, Discipline, and Safety in U.S. Public Schools: Findings from the School Survey on Crime and Safety: 2021-22. First Look. NCES 2024-043." The 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 using data from the School Survey on Crime and Safety (SSOCS). 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 on school discipline and safety policies and practices. 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 two tables in this document are: (1) Percentage of schools that took a serious disciplinary action in response to specific offenses, by type of offense and selected school characteristics: School year 2021-22 and (2) Standard errors for supplementary Table 1: Percentage of schools that took a serious disciplinary action in response to specific offenses, by type of offense and selected school characteristics: School year 2021-22.