This Equity In Action is intended to provide educators and researchers with the most comprehensive, praxis-oriented information on identifying and reducing disproportionality in schools. Over the course of developing and piloting a data-driven process (2004-2010) for identifying root causes, we’ve gained insight into not only the root causes but also the driving forces (internal and external to district) of these root causes. Our data driven root cause process focused on examining various areas of the schooling process in order to understand the interaction of school practice (inputs) and student outcomes.