Network Clusters The school district participating in the study annually administers a 30 item “School Climate Survey.” All employees at each school are asked to complete the survey. Responses to the item, “What overall grade would you give to your school?” reveal a steady decrease in the percentage of employees in treatment schools grading their school either “A” or “B” from 76.7% to 48.0% and a steady increase in the percentage of employees in treatment schools grading their school either “D” or “F” from 1.2% to 21.0% during the study period. Control schools show an inverse pattern, revealing a steady increase in the percentage of employees in control schools grading their school either “A” or “B” from 56.5% to 71.4% and a steady decrease in the percentage of employees grading their school either “D” or “F” from 15.5% to 7.5% during the study period. The three schools in the sample with the greatest changes in employees’ grading of their schools are the only three schools in the sample that experienced principal turnover during the study period. The same three schools also showed the greatest changes in responses to the item “to what extent do you feel respected by your principal?” Kathryn M. Borman , Scott Patrick Murphy, Joseph LoSasso, & Lea Schlanger