This document discusses security concerns in primary and secondary education. It addresses two main issues: threats that come from within the school community and external threats like sex offenders. It then reviews the history of school violence, noting that while dramatic school shootings receive heavy media attention, overall school violence and homicides have been declining since the early 1990s. The document proposes a multi-layered security approach of deterring threats from entering schools, detecting any security breaches, delaying threats from accessing sensitive areas, and having an emergency response plan in place.