Scale scores by social class group for U.S. and top-scoring countries, PISA 2009

Canada Finland Korea U.S.
Reading
Group 1 (Lowest) 459 466 461 442
Group 2 492 495 501 471
Group 3 518 523 529 504
Group 4 543 552 546 529
Group 5 561 571 564 563
Group 6 (Highest) 567 572 581 563
Gap (Group 6 – Group 1) 108 106 119 121
Gap (Group 5 – Group 2) 70 75 63 93
Math
Group 1 (Lowest) 471 490 452 434
Group 2 493 507 504 464
Group 3 521 528 531 491
Group 4 543 552 553 510
Group 5 560 570 579 548
Group 6 (Highest) 567 580 602 548
Gap (Group 6 – Group 1) 96 90 149 114
Gap (Group 5 – Group 2) 67 63 75 84

Source: Authors' analysis of OECD Program for International Student Assessment (PISA) 2009 database for each country

View the underlying data on epi.org.