The final sampling stage for the national main designs is the selection of students within the sampled schools and the allocation of these students to session types. The overall student sample had three parts: the initial sample, the oversample of Black and Hispanic students in low minority public schools, and the oversample of SD/LEP students in public and private schools. The student samples were drawn and allocated to session types using a computer-based system and were specified by the use of session assignment forms (SAF).
NAEP field supervisors completed student sampling a week before the assessment. student listing forms (SLF) were prepared in each participating school. All enrolled students for the sampled grade were entered on the SLF in any order. The various student samples were drawn and allocated to session types using a computer-based system and were specified through SAFs. The sampled students were identified on the SAF by the SLF line numbers organized by session type.