NAEP Technical DocumentationNAEP 2012 Sample Design

			Economics Assessment Sample Design Long-Term Trend (LTT) Assessment Sample Design

The NAEP 2012 sample design consisted of two assessments: economics and long-term trend (LTT) in mathematics and reading.

Both assessments included separate sample components for public and private schools and were based on a three-stage sample design:

selection of primary sampling units (PSUs),
selection of schools within strata, and
selection of students within schools.

The sample selection process for economics and the LTT assessment was coordinated at the PSU and school levels. The goal of the coordination was to reduce the amount of overlap between the two assessments in the selection of PSUs and in the selection of sample schools when the two assessments happen to be in the same PSU.

Last updated 25 July 2012 (DH)

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