Today’s professionals appear to be under constant pressure to be able to account for their actions and to do boundary work because there are not any evidently borders for what can be a work task. We want to contribute to a discussion about what demands pre-school teachers has to handle to perform as good professionals in these specific circumstances. From our example I pre-school settings we want to answer the question: what do professionals need to rehearse? And what new forms for this rehearsing accountability are growing up. In a seminal article Lyman and Scott argued that accounting for ones actions is a basic human activity and we use Goffman’s theory about team performance to understand these types of accounting in professional settings.