How do the samples for the Trial Urban District Assessment (TUDA) contribute to state results?
Eighteen large urban districts participated in the 2009 NAEP assessments as part of the NAEP Trial Urban District Assessment (TUDA). Larger samples of students from these districts participated in the assessment, contributing to both their state’s results, as well as results for the nation. For example, the data for students in the Chicago sample will be used to report results for Chicago, as well as Illinois and the nation. Chicago has approximately 20 percent of the students in Illinois, therefore Chicago will contribute 20 percent and the rest of the state will contribute 80 percent to Illinois’ results.
