This qualitative phenomenological research study used narrative inquiry to examine police officer perceptions of effective school responses to active shooting scenarios. Creswell's (2013) six step process for analyzing and interpreting qualitative data was used to examine the interview information. The study results support the idea that changes in current school safety measures are needed to be consistent with current best practices supported by law enforcement professionals. The findings also back the importance of working with all stakeholders to develop and implement the most effective response plan in the case of an active shooter scenario. This study will examine current school safety measures, police officer perceptions of school safety measures, innovative changes in school safety measures, and school district preparedness for changes in school safety measures and provide educational institutions with the steps needed to make innovative changes in current school safety measures that will result in minimalizing loss of life in the case of an active shooter. [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/en-US/products/dissertations/individuals.shtml.]