NAEP Assessment Sample Design → NAEP 2009 Sample Design → Sample Design for the 2009 National Assessment → 2009 Twelfth-Grade Public School National Assessment → Sampling Frame for the 2009 Twelfth-Grade Public School National Assessment → New-School Sampling Frame for the 2009 National Assessment

NAEP Technical DocumentationNew-School Sampling Frame for the 2009 National Assessment

The Common Core of Data (CCD) file used for the frame corresponds to the 2005-2006 school year¹, whereas the assessment year is the 2008-2009 school year. During this 3-year period, some schools closed, some changed structure (one school becoming two schools, for example), and others came into existence.

To achieve as close to full coverage as possible, the school frame was supplemented by a sample of new schools obtained from a sample of districts. Each sampled district was sent a list of the CCD schools and asked to add in any new schools or old schools that had become newly eligible for fourth, eighth, or twelfth grades.

Since asking every school district to list new and newly-eligible schools would have generated too much of a burden, a sample of districts was contacted to obtain a list of new schools. To represent the unsampled districts in the full sample of schools, weights for schools included in the new-school sample were adjusted to reflect the district selection probability. This was done for fourth-, eighth-, and twelfth-grade schools in one step, and this step is described in the new-school frame.

¹Except for Connecticut: the CCD year was 2004-2005 for that state, so that the CCD frame was 4 years out of date for that state.

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