Active shooter incidents are increasing across the United States. School leaders are faced with continued challenges in the classroom with growing concerns of school safety for students and teachers. Active shooter training is mandated in Texas. Yet, unknown are perceptions of teachers in Texas about active shooter training. The purpose of this study was to explore Texas teachers' perceptions of active shooter training. Emergency management theory was the conceptual framework for the study. One research question about teachers' perceptions of active shooter training in their school guided the study. A descriptive qualitative design using interviews was implemented to collect data. Snowball sampling was used to recruit participants. Each of 20 Education Service Centers were represented by public school teachers interviewed. Open and axial coding were used to derive themes. Four themes were derived: teacher input on Multihazard Emergency Operation Plans, communication for lockdown procedures, teacher's preparedness to respond to an active shooter situation, and aspects of school safety. Local and state level decisions about active shooter training could be informed by this study. [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://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]