The article communicates an investigation of how collaborative learning is constituted in a PhD-course, namely Collaborative learning in music educational settings. The course was organized and run in a way that aimed to investigate, develop and encourage collaborative learning among students and teachers in the third circle. Material produced and analysed included log-books, assignments, peer-response, after-thoughts, and a Facebook discussion-thread. The results are presented as descriptions of the constituent parts of collaborative learning occurring in the “rooms” of the course. The results show the importance of structure as well as awareness when it comes to roles and kinds of participation.