This article presents the results of a national survey conducted with 223 arts teachers working in public schools that feature mixed-age classrooms rather than traditional grade levels. The purpose of the survey was to identify the professional development needs of arts teachers working in these unique environments and to offer suggestions for policymakers who might provide appropriate training or foster the development of multi-age school sites. The results showed that most respondents (73.1%) were in favor of developing new multi-age training for arts teachers and revealed their preferences for workshop content related to organizational strategies, collaboration with colleagues, assessment, integrated curriculum, collaborative student work, research, and thematic instruction. The results also revealed respondents' preferences for venues, formats, and the scheduling of such professional development experiences. The implications of these findings provide a number of options for policymakers to weigh in planning optimum training opportunities for multi-age arts instructors.