In this article, we describe the professional development towards distributed leadership among different organizational levels in Finnish day care centres within the Helsinki metropolitan area. The aim of the study was to monitor the progress of professional development between educational administration and practitioners. The data was based on descriptions of reflective practices used in the development projects of each research day care centre. Participants were asked to describe developing practices and reflect on their own contributions to the process as both individuals and together as working teams during the two years of the development project. The researchers collected these reflections, analysed them to produce results and then delivered this evidence to participants for utilization in reflection and further processing of working practices with the support of the mentor. Directors and mentors viewed distributed leadership as a good way to encourage development practices and brought out the role of staff as important agents in the development process. The distribution of leadership seems to be best realized among the participants at the lowest and middle hierarchical levels. (author abstract)