NAEP Technical Documentation2013 Twelfth-Grade Public School National Assessment

			Target Population Sampling Frame Stratification of Schools School Sample Selection   Substitute Schools Ineligible Schools Student Sample Selection School and Student Participation

The twelfth-grade public school sample for the NAEP 2013 study was designed to achieve a nationally representative sample of twelfth-grade students enrolled in public schools in the United States. The sample was also designed to achieve state-level representative samples in 13 specific states. These states were Arkansas, Connecticut, Florida, Idaho, Illinois, Iowa, Massachusetts, Michigan, New Hampshire, New Jersey, South Dakota, Tennessee, and West Virginia.

The target sample size of assessed students for the twelfth-grade public school sample was 80,000 assessed students: 4,600 students in each of the 13 state-assessment states (approximately 60,000 students combined) and 20,000 students from the the remaining 37 states, the District of Columbia, the Bureau of Indian Education (BIE) schools, and Department of Defense Education Activity (DoDEA) schools located within the 50 states and the District of Columbia. Prior to sampling, the target sample sizes were adjusted upward to offset expected school and student attrition due to nonresponse and ineligibility.

The twelfth-grade public school sample was based on a two-stage design that involved selection of schools within strata and selection of students within schools. The first-stage sample of schools was selected with probability proportional to a measure of size based on estimated grade 12 student enrollment in the schools.

The students in the twelfth-grade public school sample were assessed in mathematics and reading.

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