An interpreter since 1973 and teacher of interpreting since 1985, he earned a doctorate in curriculum and instruction from the University of California, Riverside. Dr. Peterson works as a curriculum consultant for the National Consortium of Interpreter Education Centers, and has advised and consulted with developing interpreting programs in Thailand, the Philippines, Japan, and China. His publications include The Unlearning Curve: Learning to Learn American Sign Language and co-authorship of ASL at Work. His research interests include classroom interaction and interpreting in video settings.