School effectiveness and school improvement have different origins: School effectiveness is more directed to finding out "what works" in education and "why"; school improvement is practice and policy oriented and intended to change education in the desired direction. However, in their orientation to outcomes, input, processes, and context in education, they also have much in common. In the theoretical part, different orientations have been analysed and combined in a model for effective school improvement. Based on this analysis, an evaluation framework was developed for the analysis of the case studies of school improvement projects in the participating countries. The theoretical model and the results of the analyses of the case studies were combined in a framework of effective school improvement.