John Hattie has demonstrated in repeated meta-analyses that collective efficacy is the number one impact on student achievement (2017). As schools build an understanding about the research around collective efficacy and why it is essential, the next question is, how do we build it? Our approach to Opening Classroom Doors builds on the traditions of team visits to classrooms and combines it with the power of data team work. The result is a powerful day of inquiry-oriented, job-embedded professional learning. Read this short white paper to learn more.