Educating future researchers in science communication is an important task for a university, and also of great societal relevance. At Karlstad University, Sweden, doctoral students have completed a postgraduate course, titled “Communicating science” for three decades. The course has centred on elements such as popular science writing, oral presentation techniques and media training. The extensive course evaluation survey has, among other things, given feedback on whether the course made the doctoral student better equipped to communicate research outside their own scientific field. This presentation reports on a study of evaluations submitted during a fifteen-year period by a total of 335 doctoral students in the fields of health, natural sciences, technology, humanities and social sciences. The results indicate that the doctoral course has been a successful model, contributing to the growth of the doctoral students, scientifically as well as communicatively.