The discretion provided to states under the Every Student Succeeds Act (ESSA) offers new possibilities for policymakers to determine how best to allocate resources and support policies to provide students with a well-rounded education. As states begin to examine new strategies for improving student outcomes and developing the next generation of innovative, socially conscious citizens, policymakers frequently ask how to effectively accomplish this. Increasing access to arts in education by integrating it with other courses--such as math, science and language arts--is one strategy to consider. Integrating arts education--which includes dance, music, theater, media arts and visual arts--has proven beneficial in improving student learning and developing thinking skills and capacities, as well as supporting the civic skills necessary to contribute as a member of a diverse community. Expanding access to arts instruction in schools presents opportunities to enrich the learning environment and provide students with valuable life skills. This Education Trends report explores successful practices for arts integration, with a focus on educator and school leader professional development, and provides an overview of research that highlights the impact of instructor preparation and professional development on student outcomes.