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NAEP Assessment Sample Design → NAEP 2007 Sample Design → Sample Design for the 2007 National Assessment → 2007 Twelfth-Grade Public School National Sample → Sampling of Schools for the 2007 Twelfth-Grade Public School National Assessment

NAEP Technical DocumentationSampling of Schools for the 2007 Twelfth-Grade Public School National Assessment

As with the state operational sample, the general goal for the national twelfth-grade sample was to achieve a self-weighting sample at the student level. The target sample size in each school was 71.

The measure of size computation was similar to that used for the fourth- and eighth-grade state assessment. For the twelfth-grade sample, only one "hit" was allowed per school.

Schools were ordered within each jurisdiction using the serpentine sort (by Census division, urbanicity status, Black/Hispanic status, and estimated grade enrollment). A systematic sample was then drawn using this serpentine sorted list and the measures of size. A total of 576 schools was selected from the 21,866 eligible public schools.

New- and newly eligible-schools were sampled from the new-school frame. Five schools were selected from the 159 new schools identified. 

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