Joan Littlefield Cook is a Professor of Psychology and current chairperson of the Psychology Department at the University of Wisconsin-Whitewater. As an undergraduate she majored in Psychology at Tennessee Technological University. She earned a Master's and Ph.D. in Psychology and Human Development at Vanderbilt University. Over the last 25 years she has taught courses related to child and adolescent development, educational psychology, and cognitive psychology at the University of Wisconsin-Whitewater, the University of Wisconsin-Madison, and Middle Tennessee State University. Her classes have ranged from large lecture courses with 250 students to small seminars. Students have always appreciated her knowledge of the field and her ability to present information in a way that is useful, motivating, and friendly. The Student Association at the University of Wisconsin-Madison voted her as one of their most outstanding professors, and the UW-Whitewater Psychology Student Organization presented her with their Excellence in Teaching Award. Joan's research is on mathematical problem solving and cognitive development. She and her colleagues have published papers in the Cognition & Instruction, Journal of Educational Psychology, Intelligence, Memory & Cognition, the Gifted Child Quarterly, and the Journal of Experimental Psychology. She has co-authored two other books and numerous instructional materials.