Reading 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) | 467 | 459 | -8 | 497 | 466 | -31 | 464 | 461 | -3 | 418 | 442 | 23 |
| Group 2 | 490 | 492 | 1 | 514 | 495 | -19 | 490 | 501 | 11 | 455 | 471 | 15 |
| Group 3 | 522 | 518 | -5 | 534 | 523 | -11 | 518 | 529 | 11 | 499 | 504 | 5 |
| Group 4 | 542 | 543 | 1 | 558 | 552 | -6 | 532 | 546 | 14 | 528 | 529 | 1 |
| Group 5 | 560 | 561 | 1 | 575 | 571 | -4 | 546 | 564 | 19 | 556 | 563 | 7 |
| Group 6 (Highest) | 563 | 567 | 4 | 581 | 572 | -9 | 556 | 581 | 25 | 560 | 563 | 3 |
| National average reading score | 534 | 524 | -10 | 546 | 536 | -11 | 525 | 539 | 15 | 504 | 500 | -5 |
Source: Authors' analysis of OECD Program for International Student Assessment (PISA), 2000 database, with authors' interpolations of average test scores; Tables 1 and 5 for 2009 data