Average 8th-grade scale scores, U.S., by mathematics content area, TIMSS 1999, 2003, 2007, and 2011

1999 2003 2007 2011
Numbers 509 508 514 514
Data representation 506 527
Data and chance 533 527
Geometry 473 472 480 485
Algebra 506 510 507 512
Measurement 482 495

Source: Mullis et al. (2000); Mullis et al. (2004); Mullis et al. (2008); Mullis et al. (2012)

View the underlying data on epi.org.