Prior research about pupil welfare teams have identified problems at several levels: those of leadership, interprofessional cooperation, cooperation between the pupil welfare team and teachers, and type of work carried out. Perhaps most importantly, teams seem to work primarily with 'firefighting', i.e. acting reactively when problems already have occurred, rather than in a health promoting and preventive way. On the one hand, health promotion and prevention are endorsed as desired ways to work (e.g. SFS 2010, 800); on the other hand, reactive measures seem to dominate in practice. In order to try to bridge this gap, we carried out a study of a pupil welfare team in Sweden that we had reason to believe worked more in line with the health-promoting and preventive manner of working that is recommended. Since we could not know a priori whether the team studied worked in a qualitatively different way than other teams studied in prior research, we were led by two overarching research questions: (1) Is the studied team working in a heath promoting and preventive way? and (2) If so, how did their way of working emerge and how is it sustained? Our overriding purpose is to increase our knowledge concerning whether and how pupil welfare teams can become more health promoting and preventive in practice. More specifically, we are interested to find factors that contribute to the development and sustainability of health promoting and preventive work in pupil welfare teams.