Using Data to Improve Student Achievement is online staff development that supports principals in leading their school's improvement efforts through data-driven instructional decisions. The four modules on the right hand side focus on the competencies that principals need to develop in order to use data effectively to improve student achievement. Each module is organized around workshops that identifies an authentic performance the principal needs to effectively lead and a sequence of background knowledge and practice activities that lead to that performance.   Lorraine Costella, Kent County Superintendent What do you expect principals to do with data?