Average scale scores and percentages for grade 8 mathematics, by emphasis on algebra and functions, National School Lunch Program eligibility, 3 categories and jurisdiction: 2011 and 2009
Year	Jurisdiction	National School Lunch Program eligibility, 3 categories	Little or no emphasis		Moderate emphasis		Heavy emphasis
Year	Jurisdiction	National School Lunch Program eligibility, 3 categories	Average scale score	Percentage	Average scale score	Percentage	Average scale score	Percentage
‡ Reporting standards not met. NOTE: The NAEP Mathematics scale ranges from 0 to 500. Detail may not sum to totals because of rounding. Some apparent differences between estimates may not be statistically significant. Analyze results with NAEP Data Explorer. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 and 2011 Mathematics Assessments.
2011	National	Eligible	256	2	265	14	271	84
2011	National	Not eligible	274	1	291	12	297	87
2011	National	Information not available	274	2	285	11	298	88
2009	National	Eligible	259	2	263	16	268	82
2009	National	Not eligible	279	1	289	14	295	85
2009	National	Information not available	‡	1	284	9	298	90