“…Based on a systematic review of the literature, Stoll et al defined a professional learning community as, 'a group of people sharing and critically interrogating their practice in an ongoing, reflective, collaborative, inclusive, learningoriented, growth-promoting way […] operating as a collective enterprise ' (2006, p. 223). Following this definition, a trusting, collegial environment is crucial in the critical reflection on personal practice within a group setting, including a self-study research group (see also Hoban et al 2007, Kitchen et al 2008. Hence, our third proposition:…”