Research considers collaboration to be a significant factor in terms of how teachers use data to improve their practice. Nevertheless, the effects of teacher collaboration with regard to teachers' individual data use has remained largely underexplored. Moreover, little attention has been paid to the interplay between collaboration and the personal…

This article addresses an issue that has not been well explored in empirical research, namely whether local education agencies (districts) have an impact on student learning. We assumed that local district effects on learning would be largely indirect, mediated by how teachers work together in schools (in professional communities) and the quality…