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NAEP Sample Design → Sample Design for the 2000 Assessment → National Main Assessment Sample Design in 2000 → Student Sample Selection for the 2000 National Main Assessment → Within-School Sampling in the 2000 National Main Assessment

NAEP Technical DocumentationWithin-School Sampling in the 2000 National Main Assessment

The students selected for inclusion in the sample (in either the initial sample, Black and Hispanic oversample, or the SD/LEP oversample) were allocated to a session based on the final number of sessions assigned to the school and whether the school was public or private. Except for grade 12 public schools, students in schools with two or more assigned sessions were equally distributed across the sessions. For example, if a grade 4 public school was assigned four sessions—one in mathematics, one in reading, and two in science—and had a sample size of 100 students, 25 students would be assigned to mathematics, 25 to reading, and 50 to science. Grade 12 public schools with two assigned sessions distributed students unequally in order to meet the desired subject-specific sample sizes. Seven out of 16 students were assigned to mathematics and 9 out of 16 students were assigned to science.

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