James W. Stigler is professor of psychology at UCLA, director of the TIMSS video studies, and founder of LessonLab Inc. He is co-author of The Teaching Gap (with James Hiebert, Free Press, 1999) and The Learning Gap (with Harold Stevenson, Simon & Schuster, 1992). He received his A.B. from Brown University in 1976, a masters in education from the University of Pennsylvania in 1977, and a Ph.D. in developmental psychology from the University of Michigan in 1982. Before moving to Los Angeles in 1991, he served eight years on the faculty of the University of Chicago. He has received numerous awards for his research, including a Guggenheim Fellowship and the QuEST award from the American Federation of Teachers. Stigler is best known for his observational work in classrooms, and has pioneered the use of multimedia technology for the study of classroom instruction.