In this study, we describe the development of working practices in Finnish day care centers within the Helsinki metropolitan area, which has 500 day care centers. Every two years, 21 of them are selected for a study to be included in a development network. The Development Unit of Early Childhood Education (VKK-Metro), which includes the University of Helsinki and four municipalities in the metropolitan area, coordinates the development of working practices. The objective is to collaborate on the development of day care pedagogy. The objectives and operating structure of VKK-Metro and the principles of developing practices included within it are described and the operation itself is illustrated in the context of the research results. The leading idea is the development of working practices and pedagogy through a reflective and open dialogue. Research results will be utilized in the development of the day care network studied and in workshops arranged for educators in the region.