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NAEP Technical DocumentationIneligible Schools for the 2009 Twelfth-Grade Public School National Assessment

The Common Core of Data (CCD) public school file from which most of the sampled schools were drawn corresponds to the 2005-2006 school year, some three years prior to the assessment school year. During the intervening period, some of these schools either closed, no longer offered the grade of interest, or were ineligible for other reasons. In such cases, the sampled schools were considered to be ineligible.

The table below presents unweighted counts of ineligible schools and their eligibility, by status, for the school samples.

NAEP twelfth-grade sample public schools, by eligibility status: 2009

Eligibility status	Unweighted count of schools	Unweighted percent
# Rounds to zero. NOTE: Detail may not sum to totals due to rounding. Total and eligible school counts are rounded to nearest ten. Percentages based on rounded counts. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Assessment.
Total	1,700	100.00
Eligible	1,570	92.35
No eligible students in grade	4	0.24
Does not have sampled grade	11	0.65
School closed	29	1.71
Not a regular school	82	4.82
Other ineligible school	2	0.12
Duplicate on sampling frame	#	#

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