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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 2011 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 2007-2008 school year provided the frame for all regular and state-operated public, Bureau of Indian Education (BIE), and Department of Defense Education Activity (DoDEA) schools.
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 NAEP 2011 sampling frame were compared to school and student counts from the previous frames (2009 and 2010). No revisions to the frame were needed as a result of this check.