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NAEP Sample Design → Sample Design for the 2000 Assessment → National Main Assessment Sample Design in 2000 → Sampling of Schools in the 2000 National Main Assessment → Sample Type Assignment to Schools in the 2000 National Main Assessment

NAEP Technical DocumentationSample Type Assignment to Schools in the 2000 National Main Assessment

To determine the effect of using different inclusion criteria for students who might otherwise be excluded from the assessment, two different sample types (S2 and S3) were assigned to the sampled schools. For schools assigned to sample type S3, certain accommodations were offered to students with disabilities (SD) and students who were limited English proficient (LEP) to enable participation in the NAEP assessment. In sample type S2 schools, no such assessment accommodations were offered to SD/LEP students. Because of the offered accommodations, a larger proportion of the student population was able to participate in NAEP than when accommodations were not available.

Sample type was assigned to schools separately for each grade so that 50 percent of the schools were assigned sample type 2 and 50 percent were assigned sample type 3. Schools that were sampled for more than one grade were assigned only one sample type, which was used then for all sampled grades. Schools selected for both the national main and state samples were assigned only one sample type as well to enable a school to provide the same assessment accommodations and to implement the same exclusion criteria regardless of grade or NAEP sample.

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