Mathematics score changes, scale scores by social class group for U.S. and top-scoring countries, PISA 2000–2009

Canada Finland Korea U.S.
2000 2009 Change 2000 2009 Change 2000 2009 Change 2000 2009 Change
Group 1 (Lowest) 487 471 -17 507 490 -17 473 452 -20 416 434 18
Group 2 502 493 -9 518 507 -11 501 504 3 446 464 17
Group 3 523 521 -1 527 528 1 538 531 -8 490 491 1
Group 4 539 543 4 544 552 8 556 553 -3 510 510 0
Group 5 551 560 9 558 570 12 577 579 2 543 548 4
Group 6 (Highest) 556 567 11 565 580 15 588 602 13 554 548 -6
National average math score 533 527 -6 536 541 4 547 546 -1 493 487 -6

Source: Authors' analysis of OECD Program for International Student Assessment (PISA) 2000 database, with authors' interpolations of average test scores, and Tables 1 and 5 for 2009 data

View the underlying data on epi.org.