Isabel L. Beck, PhD, is Professor Emerita of Education in the School of Education at the University of Pittsburgh. She has conducted research and published widely in the areas of decoding, vocabulary, and comprehension. Her contributions have been acknowledged by awards from the International Reading Association, the National Reading Conference, and the American Federation of Teachers, and she is an elected member of the National Academy of Education.  Margaret G. McKeown, PhD, is a Senior Scientist at the Learning Research and Development Center of the University of Pittsburgh. Her research on reading comprehension and vocabulary has been published extensively in outlets for both researcher and practitioner audiences. Dr. McKeown is a recipient of the Dissertation of the Year Award from the International Reading Association and a National Academy of Education Spencer Fellowship. Before her career in research, she taught elementary school. Linda Kucan, PhD, is Assistant Professor in the Department of Instruction and Learning at the University of Pittsburgh School of Education. In addition to vocabulary instruction, her research interests include classroom talk about texts and the design of meaningful and motivating tasks to support comprehension of text.