|Country and race/ethnicity||Average score||Country and race/ethnicity||Average score|
|TIMSS scale average||500||TIMSS scale average||500|
|United States1,2,3||508||United States1,2,3||520|
|Two or more races||506||Two or more races||522|
|Countries whose scores were higher than the U.S. score||Countries whose scores were higher than the U.S. score|
|Korea, Republic of||597||Chinese Taipei||561|
|Hong Kong SAR1,4||572||Korea, Republic of||553|
|Countries whose scores were not measurably different from the U.S. score||Czech Republic||539|
|Russian Federation||512||Countries whose scores were not measurably different from the U.S. score|
|Czech Republic||504||Hong Kong SAR1,4||530|
|Countries whose scores were lower than the U.S. score||Australia||515|
|Armenia||499||Countries whose scores were lower than the U.S. score|
|Bosnia and Herzegovina||456||Bosnia and Herzegovina||466|
|Thailand||441||Iran, Islamic Republic of||459|
|Tunisia||420||Syrian Arab Republic||452|
|Iran, Islamic Republic of||403||Tunisia||445|
|Syrian Arab Republic||395||Georgia5||421|
|Palestinian National Authority||367||Algeria||408|
|Botswana||364||Palestinian National Authority||404|
|El Salvador||340||El Salvador||387|
|1 Met guidelines for sample participation rates only after substitute schools were included.|
2 National Defined Population covers 90 percent to 95 percent of National Target Population.
3 Includes other races/ethnicities not separately shown.
4 Hong Kong is a Special Administrative Region (SAR) of the People's Republic of China.
5 National Target Population does not include all of the International Target Population defined by TIMSS.
6 National Defined Population covers less than 90 percent of National Target Population (but at least 77 percent).
7 Kuwait tested the same cohort of students as other countries, but later in 2007, at the beginning of the next school year.
NOTE: Scores are reported on a scale of 0 to 1,000. The tests for significance take into account the standard error for the reported difference. Thus, a small difference between the United States and one country may be significant while a larger difference between the United States and another country may not be significant. For more information on the international requirements for sampling, data collection, and participation rates, see Highlights From TIMSS 2007: Mathematics and Science Achievement of U.S. Fourth- and Eighth-Grade Students in an International Context, Appendix A (Gonzales et al. 2008) for information.
SOURCE: International Association for the Evaluation of Educational Achievement (IEA), Trends in International Mathematics and Science Study (TIMSS), 2007.