NAEP Technical DocumentationSampling Frame for the 2015 Twelfth-Grade Public School National Assessment
 

			Twelfth-Grade Schools and Enrollment in the CCD-Based Public School Sampling Frame Twelfth-Grade Schools and Enrollment in the New-School Sampling Frame

As with the grades 4 and 8 public school samples, the primary sampling frame for the grade 12 public school sample was derived from the Common Core of Data (CCD) file corresponding to the 2012-2013 school year. The CCD files provided the frame for all regular public, state-operated public, Bureau of Indian Education (BIE), and Department of Defense Education Activity (DoDEA) schools open during the 2012-2013 school year. 

Because the CCD-based frame does not contain schools that opened between 2013 and the time of the assessments, a secondary sampling frame was created. This frame contains brand-new and newly-eligible grade 12 schools and is referred to as the new school sampling frame.

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

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