The two studies presented in this conference proceeding describe and analyze the beliefs, knowledge and practices of administrators, and teachers about UDL. The first study analyzes data collected from interviews with 15 administrators. The second example describes result of a mixed methods study conducted with teachers participating in UDL professional development. The results of these studies provide necessary insight into the beliefs, knowledge and practices of administrators and teachers who are responsible for recommending future instructional UDL practices, thereby helping to ensure that the UDL framework is wholeheartedly adopted by educators.