School and school leadership are discussed frequently in different media In Sweden, with different actors and in different arenas. This is a pattern that shows that the school organisation is an issue that arouse interest and engages. An actor with a particular major lobbying force is the media. The image that the media choose to present has significant influence over how the public perceives the Swedish school system. Although the picture presented is not unequivocal, the dominant picture is not a positive one. This has contributed to that the common swede is now more pensive, and even concerned about the work being done in Swedish schools. A further result is that faith in school principal and teachers has decreased in the resent decades. This in turn has created space for other actors to step forward and 'tell' how schools should be run to achieve the best results.  One prevailing view is that the distance between scientific research and the work done in classrooms are too far. One possible explanation for this may be that many studies are not based on teachers ' and school leaders' genuine needs. I believe that research from a practitioner's perspective gives access to the knowledge that is embedded in those who practice the profession every day.  In this presentation I will talk about a study where principals and a researcher explore pedagogical leadership together in an action research.    Principal´s pedagogical leadership is an important issue to examine since the general perception is that this kind of leadership is needed to be improved and given a wider scale in the school organization. We could conclude, after studying how such leadership can be recognized, that this leadership is most common understood as "good leadership". It is advocated and demanded, but at the same time there are different interpretations about what characterizes it. A further complicating factor is that there are several descriptions of how it could or should be put into practice. Our entry into the study was that there is a leadership that is advocated, but also a leadership that is surrounded by uncertainty and ambiguity in how it can be embodied in practice.  Practice architecture is the theoretical framework that has been used to analyse the results in the study.