Introduction of a pedagogical concept, Kubus, in a problem oriented learning context--analysed within the framework of an activity system--indicates what might happen when offering tools tempting to influence and regulate students' learning approach and hereby neglecting the importance of existing habits and values. Introduction of this new approach challenges existing "truisms". It implies a reconsideration of the role of insecurity and how it is connected to questioning the given thus supporting development of new knowledge. However, dealing with insecurity seems to be a neglected area within a problem oriented learning approach.