“…When educators confirm that they look at their educational practice from a different perspective (after having received a training) this still does not yet provide evidence that their teaching has become (more) effective, (more) inclusive, or (more) relevant. One of the outcomes of a recent study with honours teachers, of whom some were involved with international education (Heijne-Penninga, Wijkamp, Hogenstijn & Wolfensberger, 2018), is a predominantly 'neutral' answer by the participants to the question whether their training led to the improvement of student learning. The actual effect of professional training on the core business of education -i.e.…”