ABSTRACT In spite of continuing investigations, researchers have yet to satisfy practitioners, policy‐makers and the international research community about production of a defensible collection of important indicators for gauging school effectiveness. The research project described in this article had four major purposes: (a) to investigate and compare the perceptions of principals, teachers and area superintendents about the overall effectiveness of schools and effectiveness on specific dimensions; (b) to assess and compare the perceptions of these educators about the importance of the specific dimensions for overall effectiveness; (c) to assess the association between principals’ perceptions of effectiveness on, and importance, of these dimensions; and (d) to probe school‐level differences about the two types of organizations. Perceptual data were obtained from elementary and junior high school principals throughout Alberta, Canada, as well as from teachers and area superintendents in one major city. Sc...