Mathematics scores at all five selected percentiles for students with disabilities were higher in 2011 than in 1996, and scores at all but the 90th percentile were lower in 2011 than in 2009.
Read specific descriptions of what fourth-graders should know and be able to do at the Basic, Proficient, and Advanced mathematics achievement levels.
Read more information on how to interpret NAEP mathematics results, including how each student group is defined.