8th grade TIMSS math trends, select U.S. states, 1995–2011
| State | 1995 | 1999 | 2007 | 2011 | Average annual change |
|---|---|---|---|---|---|
| Connecticut | — | 512 | — | 518 | +0.1% |
| Massachusetts | — | 513 | 547 | 561 | +0.7% |
| Minnesota | 518 | — | 532 | 545 | +0.3% |
| North Carolina | — | 495 | — | 537 | +0.7% |
| Indiana | — | 515 | — | 522 | +0.1% |
| Missouri | 505 | 490 | — | — | -0.8% |
| Oregon | 525 | 514 | — | — | -0.5% |
Source: Harmon et al. (1997); Mullis et al. (1998); Mullis et al. (2001a); Mullis et al. (2012); NCES NAEP Data Explorer