William H. Schmidt is University Distinguished Professor at Michigan State University and National Research Coordinator and executive director of the U.S. National Center, which oversaw participation of the United States in the IEA sponsored Third International Mathematics and Science Study (TIMSS). Curtis C. McKnight is professor of mathematics at the University of Oklahoma. Richard T. Houang is senior researcher with the U.S. National Center for TIMSS at Michigan State University. HsingChi Wang is senior researcher with the U.S. National Center for TIMSS at Michigan State Univers...