This study evaluated two methods of training staff who were working with individuals with developmental disabilities: pyramidal training and consultant-led training. In the pyramidal training, supervisors were trained in the principles of applied behavior analysis (ABA) and in delivering feedback. The supervisors then trained their direct-care staff and, subsequently, provided ongoing performance feedback. In the consultant-led training, the direct-care staff was trained in the principles of ABA. Both groups learned similar amounts of knowledge of ABA principles, but pyramidal training was more effective in teaching staff to use correct teaching procedures with consumers. In addition, the pyramidal training group maintained the improvement in their teaching procedures at a 3-month follow up, while the consultant-led training group's performance declined. (Contains 2 tables and 1 figure.)