* Organisation for Economic Co-operation and Development. See http://nces.ed.gov/pubsearch/pubsinfo.asp?pubid=2001096 for results for all 28 countries participating in the study. Countries are ranked by the weighted average of their content and skills scores (this value is provided in parentheses to the right of the country name). Civics content knowledge scores were weighted more heavily than civics skills in determining the average.
** Weighted average is statistically significantly lower (p < .05) than that of the United States.

Source: U.S. Department of Education, Office of Educational Research and Improvement, National Center for Education Statistics, What Democracy Means to Ninth Graders: U.S. Results from the International IEA Civic Education Study, NCES 2001-096 (Washington, DC: U.S. Government Printing Office, 2001), 14 fig. 2.2, 15 fig. 2.3. “IEA” stands for International Association for the Evaluation of Educational Achievement.