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Table 4. Trends in average science scores of fourth- and eighth-grade students, by country: 1995 to 2007

Grade four Grade eight
Country Average score Difference1 Country Average score Difference1
1995 2007 2007-1995 1995 2007 2007-1995
Singapore 523 587 63* Lithuania2 464 519 55*
Latvia2 486 542 56* Colombia 365 417 52*
Iran, Islamic Rep. of 380 436 55* Slovenia 514 538 24*
Slovenia 464 518 54* Hong Kong SAR3, 4 510 530 20*
Hong Kong SAR3 508 554 46* England 533 542 8
Hungary 508 536 28* United States4, 5 513 520 7
England 528 542 14* Korea, Rep. of 546 553 7*
Australia 521 527 6 Russian Federation 523 530 7
New Zealand 505 504 -1 Hungary 537 539 2
United States4, 5 542 539 -3 Australia 514 515 1
Japan 553 548 -5* Cyprus 452 452 #
Netherlands6 530 523 -7 Japan 554 554 -1
Austria 538 526 -12* Iran, Islamic Rep. of 463 459 -4
Scotland 514 500 -14* Scotland4 501 496 -5
Czech Republic 532 515 -17* Romania 471 462 -9
Norway 504 477 -27* Singapore 580 567 -13
   Czech Republic 555 539 -16*
   Norway 514 487 -28*
   Sweden 553 511 -42*

Color swatch indicating that Country difference in average scores between 1995 and 2007 is greater than analogous U.S. difference (p < .05) Country difference in average scores between 1995 and 2007 is greater than analogous U.S. difference (p < .05)
Color swatch indicating that Country difference in average scores between 1995 and 2007 is not measurably different from analogous U.S. difference (p < .05) Country difference in average scores between 1995 and 2007 is not measurably different from analogous U.S. difference (p < .05)
Color swatch indicating that Country difference in average scores between 1995 and 2007 is less than analogous U.S. difference (p < .05) Country difference in average scores between 1995 and 2007 is less than analogous U.S. difference (p < .05)
# Rounds to zero.
*p < .05. Within-country difference between 1995 and 2007 average scores is significant.
1 Difference calculated by subtracting 1995 from 2007 estimate using unrounded numbers.
2 In 2007, National Target Population did not include all of the International Target Population defined by the Trends in International Mathematics and Science Study (TIMSS).
3 Hong Kong is a Special Administrative Region (SAR) of the People's Republic of China.
4 In 2007, met guidelines for sample participation rates only after substitute schools were included.
5 In 2007, National Defined Population covered 90 percent to 95 percent of National Target Population.
6 In 2007, nearly satisfied guidelines for sample participation rates only after substitute schools were included.
NOTE: Bulgaria collected data in 1995 and 2007, but due to a structural change in its education system, comparable science data from 1995 are not available. Countries are ordered by the difference between 1995 and 2007 overall average scores. All countries met international sampling and other guidelines in 2007, except as noted. Data are not shown for some countries, because comparable data from previous cycles are not available. 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 large difference between the United States and another country may not be significant. Detail may not sum to totals because of rounding. The standard errors of the estimates are shown in tables E-20 and E-21 available at http://nces.ed.gov/pubsearch/pubsinfo.asp?pubid=2009001.
SOURCE: International Association for the Evaluation of Educational Achievement (IEA), Trends in International Mathematics and Science Study (TIMSS), 1995 and 2007.


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National Center for Education Statistics - http://nces.ed.gov
U.S. Department of Education