Situational crime prevention (SCP) techniques have proven successful in a variety of spheres. One setting that has increasingly relied on such tactics to control crime, namely schools, has not been subject to much evaluation, however. Much of the school crime research has focused on distal risk factors such as individual propensity and ignored more proximal factors, specifically opportunities for crime. Additionally, research that does evaluate opportunities for crime in school settings does so with limited theoretical bases and methodologies. Given the pervasiveness of SCP tactics within schools, as well as the associated costs, this is a clear void in need of research. Using a cross-sectional, nationally representative sample of schools, this study investigated the efficacy of a variety of SCP tactics with regard to violent and property crimes, net of statistical controls. The findings revealed that most SCP techniques did not have a relationship with school crime, with the exception of closing campus for lunch and the number of classroom changes. The discussion considers the robustness of these results, focusing on the methodological and substantive mechanisms that may underlie them.