Mathematics score comparisons, by social class group, Korea and U.S., TIMSS (8th-graders) and PISA (15-year-olds), 1999/2000–2007

Social class groups TIMSS 1999 TIMSS 2007 Change (scale points) PISA  2000 PISA  “2007” Change (scale points) TIMSS–PISA rough agreement?
Korea
Group 1 (Lowest) 527 528 1 473 450 -23 No
Group 2 550 548 -2 501 502 1 Yes
Group 3 581 584 2 538 532 -6 Yes
Group 4 605 613 7 556 554 -2 No
Group 5/6 (Higher/highest) 625 643 18 580 591 11 No
National average 587 597 10 547 547 0 No
United States
Group 1 (Lowest) 439 461 23 416 423 7 No
Group 2 461 482 22 446 445 -1 No
Group 3 495 515 20 490 479 -11 No
Group 4 523 538 15 510 504 -6 No
Group 5/6 (Higher/highest) 537 546 8 548 535 -13 No
National average 502 508 7 493 479 -14 No

Note: PISA "2007" is a weighted average of PISA 2006 and PISA 2009 data, where PISA 2006 has twice the weight of PISA 2009.

Source: Trends in International Mathematics and Science Study (TIMSS) as reported in Mullis et al. (2012); OECD Program for International Student Assessment (PISA) (2010a)

View the underlying data on epi.org.