This study on barriers to online staff development for classroom teachers was conducted as part of the planning activities of a delivery models project designed to develop guidelines for implementing large-scale online staff development programs. The study involved engaging 54 general and special educators in several professional roles from nine states in a series of focus groups to identify the barriers to online staff development. An instrument was designed to rank order the barriers in terms of perceived significance. Twenty-two barriers were identified. This project was in follow-up to the Online Academy (H029K73002) funded by the Office of Special Education Programs in the U.S. Department of Education (OSEP/USDOE).