Daniel F. McCaffrey is Senior Statistician and PNC Chair in Policy Analysis at RAND Corporation’s Pittsburgh Office. He is a fellow of the American Statistical Association and is nationally recognized for his work on value-added modeling for estimating teacher performance. He is currently leading an evaluation of the Pennsylvania Value-Added Assessment Pilot Program, and is co-PI of a project funded by the Institute of Education Science's (IES) that is developing alternative value-added models of teachers' effectiveness. Dr. McCaffrey is also the principal investigator of a National Institute on Drug Abuse funded study, and is working on the design of a random trial of the Cognitive Tutor Geometry curriculum funded by IES. Prior to this work, he was the lead statistician on two recent randomized field trials of school based interventions: an evaluation of the Project ALERT Plus middle and high school drug prevention program and an evaluation of the teen dating violence prevention curriculum, Break the Cycle. Dr. McCaffrey has presented his work to numerous audiences including the American Federation of Teachers, the National Education Association, the Ohio Department of Education and several workshops on value-added modeling. Dr. McCaffrey received his Ph.D. in statistics from North Carolina State University.