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Safety and Security Practices at Public Schools - National Center for ...

on school safety and discipline provided by the school or school district. Figure 1. Percentage of public schools that used selected safety and security measures: School years 2009–10, 2017–18, and 2019–20. 0. 2017–18 2019–20. 3. 0.0 20.0 40.0 60.0 80.0 100.0. Percent Safety and security measure. Random metal detector checks Required ...