Maryellen Weimer is an Associate Professor of Teaching and Learning at the Berks Lehigh Valley College of Penn State and served as one of the college's academic officers on an interim appointment from 1998?to 2000. Previously she was an Associate Director of the National Center on Postsecondary Teaching, Learning and Assessment, a five-year, $5.9 million, U. S. Department of Education research and development center. The Center was part of the Center for the Study of Higher Education at Penn State University where Dr. Weimer was a senior research associate before returning to the teaching faculty in 1994. Dr. Weimer has served on the editorial boards of four journals, and has consulted with over 175 colleges and universities on instructional issues. Since 1990, Dr. Weimer has delivered keynotes at eight national meetings and seven regional conferences.?For more than a decade?she has edited the Teaching Professor, a monthly newsletter on college teaching with 14,000 subscribers. She has edited or authored nine books, including the recent Jossey-Bass title, Learner-Centered Teaching: Five Key Changes to Practice.