“…The CPD programme required the collective participation of all teachers who taught in the same grade at the schools, and there were plenty of opportunities to engage in active learning sessions. The trainer provided the teachers with extensive feedback, because learning about teaching is enhanced when the approaches that are advocated in the CPD programme are modelled by the teacher educator who is delivering the CPD programme (Korthagen, Loughran, & Russell, 2006). A considerable part of the CPD programme consisted of video-based learning, since research has shown that the use of videos can yield positive effects on teachers' beliefs and on their interaction skills (Fukkink, Trienekens, & Kramer, 2011;Van Es & Sherin, 2010).…”