In honor of the new century and the twentieth anniversary of NewDirections for Teaching and Learning, this issue reviews the pastand current research on teaching, learning, and motivation, andenvisions where the field is headed in the next century. Chaptersrevisit the topics from the best-selling NDTL issues, offering thelatest developments in group-based learning, effectivecommunication, teaching for critical thinking, the seven principlesfor good practice in undergraduate education, teaching fordiversity, and teaching in the information age. This is the 80th issue of the quarterly journal NewDirections for Teaching and Learning .