District of Columbia Public Schools' 4th-grade math scores, all and by income group, NAEP, 2003–2011
|Grade 4||All/scale score||Low-income||Non-low Income|
Note: Low-income students are those who are eligible for free or reduced-price lunch. Graph shows scores for odd-numbered years; lines interpolate points in-between.
Source: DCPS National Assessment of Educational Progress data (Levy 2012c)