Public schools have transformed significantly over the past several decades in response to concerns about rising school violence. Today, most public schools are high-security environments employing police officers, security cameras, and metal detectors, as well as strict discipline policies to keep students in line and maintain safe campuses. These changes undoubtedly influence the social climate of schools, yet we know very little about how students experience and perceive these measures. Via ethnographic research in two contemporary public high schools, the author examines students' perceptions of high-security school environments, including perceptions of their school resource officer, schools' discipline policies, punishments, and fairness in rule application. Findings show that students believe their schools to be safe places and think many of the security strategies their schools use are unnecessary. Students further express feeling powerless as a result of the manner in which their schools enforce rules and hand down punishments. (Contains 7 notes.)