|Figure 16-1: Average science scale scores for 4th-grade students, by content domain: 2007|
NOTE: The United States met guidelines for sample participation rates only after substitute schools were included. The National Defined Population covered 90 to 95 percent of the National Target Population in the United States.
SOURCE: Gonzales, P., Williams, T., Jocelyn, L., Roey, S., Kastberg, D., and Brenwald, S. (2009). Highlights From TIMSS 2007: Mathematics and Science Achievement of U.S. Fourth- and Eighth-Grade Students in an International Context (NCES 2009-001 Revised), tables 11 and 14, data from the International Association for the Evaluation of Educational Achievement (IEA), Trends in International Mathematics and Science Study (TIMSS), 2007.