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Fourth- and Eighth-Grade Schools and Enrollment in Public School Sampling Frame
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Drawing the school samples for the 2017 assessments required a comprehensive list of public schools in each jurisdiction containing information for stratification purposes. As in previous NAEP assessments, the Common Core of Data (CCD) file developed by NCES was used to construct the sampling frame. The CCD file corresponding to the 2014-2015 school year provided the frame for all regular and state-operated public, Bureau of Indian Education (BIE), Department of Defense Education Activity (DoDEA) schools, and schools in Puerto Rico.
The sampling frame excluded ungraded schools, vocational schools with no enrollment, special education-only schools, prison and hospital schools, virtual or online schools, home-school entities, and juvenile correctional institutions.
For quality control purposes, school and student counts from the 2017 sampling frame were compared to school and student counts from previous NAEP frames (2015 and 2016). No revisions to the frame were needed as a result of this check.