NAEP Technical DocumentationSampling Frame for the 2005 Twelfth-Grade Public School National Assessment

Like the NAEP State sample, the sampling frame for public schools was derived from the Common Core of Data (CCD) file corresponding to the 2002-03 school year. The CCD files provided the frame for all regular public, state-operated public, Bureau of Indian Affairs (BIA), and Department of Defense (DoD) domestic schools open during the 2002-03 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 CCD frame public school enrollment and counts, by Census region: 2005
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), 2005.

For quality control purposes, school and student counts from the sampling frame were compared to school and student counts from previous frames (2002 and 2003). No major issues were found.

Last updated 16 March 2009 (RF)

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