NAEP Technical DocumentationSampling Frame for the 2007 Twelfth-Grade Public School National Assessment

As with the NAEP State sample, the sampling frame for public schools was derived from the Common Core of Data (CCD) file corresponding to the 2004-2005 school year. The CCD files provided the frame for all regular public, state-operated public, Bureau of Indian Education (BIE), and Department of Defense Domestic Dependent Elementary and Secondary Schools (DDESS) open during the 2004-2005 school year.

The sampling frame excluded ungraded schools, vocational schools with no enrollment, special education-only schools, prison and hospital schools, home-school entities, virtual or online schools, and juvenile correctional institutions.

The following table presents the number of schools and estimated enrollment for the twelfth-grade CCD frame by Census region.

NAEP twelfth-grade Common Core of Data (CCD) frame public school enrollment and counts, national assessment, by school and Census region: 2007
Census region	Schools	Percent	Estimated enrollment	Percent
Total	21,866	100.00	3,121,216	100.00
Northeast	3,000	13.72	548,430	17.57
Midwest	6,440	29.45	749,183	24.00
South	7,179	32.83	1,052,706	33.73
West	5,247	24.00	770,897	24.70
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2007.

Last updated 24 November 2009 (JL)

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