In this quantitative study, the perceptions of safety and preparedness of Missouri's high school administrators after participating in active shooter training as mandated by Missouri's Senate Bill No. 75 were analyzed. As school shootings continue, states have passed legislation to prepare schools to provide safety for students and faculty members (Shah, 2013b). There are currently limited data about the perceived effectiveness of Missouri's Senate Bill No. 75 and its ability to help administrators feel safe and prepared in the event of an active shooter. This study involved examination of what schools can do to prepare for a school shooting before one occurs and what schools can do during a school shooting. It also included information on what schools can expect after a shooting has occurred. Fifty-two Missouri high school administrators were surveyed, then data were aggregated by gender, years of educational experience, years of administrative experience, district size, and district location (urban or rural) as reported by the administrators. The majority, or 86.6%, of Missouri high school administrators felt more safe and prepared after participating in active shooter training. Differences did exist between rural and urban administrators in the perception of safety and preparedness with three of the smallest districts indicating feeling the least amount of safety and preparedness. When parsing data by gender only two of the 26 females did not feel prepared after training, while 10 males indicated they did not feel prepared after training. A slight majority, or 53.8%, of the administrators, were not in favor of arming selective school personnel after proper training. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]