Kimberly Kappler Hewitt is Assistant Professor of Educational Leadership at the University of North Carolina Greensboro, USA. She conducts research on the implementation of student growth measures in educator evaluations. Audrey Amrein-Beardsley is Associate Professor of Educational Policy and Evaluation at Arizona State University, USA. Her areas of research interest include measurement, research methods, high-stakes tests and value-added methodologies and systems. Beardsley is author of over fifty journal articles as well as an academic book on value-added models in education.