The Comprehensive Assessment of Leadership for Learning (CALL) is a cloud-based school-wide leadership assessment and feedback system. Rather than focus on an individual school leader, CALL utilizes a multi-source comprehensive survey to assess core leadership practices that are distributed across the school building. Upon completion of the survey, users receive automated targeted data and feedback designed to support school improvement and professional growth. In addition, the CALL system provides district leaders with information on school leadership effectiveness. The CALL instrument was developed and validated at the University of Wisconsin-Madison through a four-year grant funded by the Institute of Education Sciences in the US Department of Education.