Internationally there is an increasing trend to publish and feed back information to schools and teachers on their functioning. School improvement is often the central goal, though accountability and the promotion of parental/student school choice also play an important role.Practical initiatives and research in this field have often failed to recognize the full complexity of improving schools through school performance feedback. Relevant questions are, for example, to what extent: the information fed back to schools is valued and understood by them; the school performance feedback enables...