Dr. Ron Larson is a professor of mathematics at The Pennsylvania State University, where he has taught since 1970. He received his Ph.D. in mathematics from the University of Colorado and is considered the pioneer of using multimedia to enhance the learning of mathematics, having authored over 30 software titles since 1990. Dr. Larson conducts numerous seminars and in-service workshops for math educators around the country about using computer technology as an instructional tool and motivational aid. He is the recipient of the 2013 Text and Academic Authors Association Award for CALCULUS, the 2012 William Holmes McGuffey Longevity Award for CALCULUS: AN APPLIED APPROACH, the 2011 William Holmes McGuffey Longevity Award for PRECALCULUS: REAL MATHEMATICS, REAL PEOPLE, and the 1996 Text and Academic Authors Association TEXTY Award for INTERACTIVE CALCULUS (a complete text on CD-ROM that was the first mainstream college textbook to be offered on the Internet). Dr. Larson authors numerous textbooks including the best-selling Calculus series published by Cengage Learning.David M. Kennedy received his Ph.D. from Yale University. He is the Donald J. McLachlan Professor of History Emeritus and co-director of The Bill Lane Center for the Study of the North American West at Stanford University. His first book, BIRTH CONTROL IN AMERICA: THE CAREER OF MARGARET SANGER, was honored with both the Bancroft Prize and the John Gilmary Shea Prize. He has won numerous teaching awards at Stanford, where he teaches both undergraduate and graduate courses in American political, diplomatic, intellectual, and social history, and in American literature. Dr. Kennedy published a volume in the OXFORD HISTORY OF THE UNITED STATES, FREEDOM FROM FEAR: THE AMERICAN PEOPLE IN DEPRESSION AND WAR, 1929--1945, for which he was honored with the 2000 Pulitzer Prize. He is an elected fellow of the American Academy of Arts and Sciences and of the American Philosophical Society, and he served from 2002--2011 on the board of the Pulitzer Prizes.