Ellen B. Mandinach is a senior research scientist and the director of the Data For Decisions Initiative at WestEd. Mandinach’s work for more than a decade has focused on data-driven decision making at all levels of the education system. She has directed many projects that have examined how educators use data to inform their practice. Her work has appeared in numerous journals, including Teachers College Record, Educational Researcher, Educational Psychologist, and Phi Delta Kappan. Mandinach’s books include: Transforming Teaching and Learning Through Data-Driven Decision Making (Corwin, 2012), Data-Driven School Improvement: Linking Data and Learning (Teachers College Press, 2008), Remaking the Concept of Aptitude: Extending the Legacy of Richard E. Snow (Lawrence Erlbaum Associates, 2002), and Classroom Dynamics: Implementing a Technology-Based Learning Environment (Lawrence Erlbaum Associates, 1994). She holds a Ph.D. from Stanford University in Educational Psychology.