After violent episodes too numerous to list and too terrible to forget, schools and universities have been focused for several years on enhancing security in their facilities. Doors are among the most critical points of concern for school personnel responsible for keeping buildings safe. Education institutions want doors that let the right people in and keep the wrong people out. Well-designed, properly secured doors supplemented by equipment that wards off intruders, controls access, and prevents damage can help educators provide a safe environment that is conducive to learning. This article describes several systems and strategies that will help schools improve their security systems.