The purpose of this study was to develop a training for physical education (PE) teachers on how to create a need-supportive learning environment. This article described how researchers and experienced secondary school PE teachers closely collaborated to develop a continuous professional development (CPD) training grounded in Self-Determination Theory’s principles of need-supportive teaching. The findings suggest that teachers highly valued opportunities for active participation, collaboration and experiential learning. In addition, the PE teachers highly appreciated the theoretical background information to be able to understand and follow the rest of the training.