Scores at all five selected percentiles for students who were eligible for the National School Lunch Program were higher in 2009 than in 1998, but were not significantly different when compared to 2007.
Because of the improved quality of the data on students' eligibility for NSLP, the percentage of students for whom information was not available has decreased compared to the percentages reported prior to the 2003 assessment. See the proportion of students in each category in the NAEP Data Explorer.