Over the past 30 years, research interest in PWS has focused on questions related to the identification of syndrome features, determination of etiology and incidence, and effectiveness of both medical and nutritional management strategies. Residential and day treatment facilities have emphasized control of food and of inappropriate behaviors. The present training program developed techniques and materials to encourage positive behaviors and minimize inappropriate behaviors, supplementing earlier techniques. Activities from social skills training curricula were adapted to the needs of PWS persons. Training sessions were held with staff in residential settings to field test the techniques. This paper summarizes the training program and describes effective techniques and materials.