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NAEP Technical DocumentationWeighted Student Response and Exclusion Rates for the 2009 Twelfth-Grade Public School National Science Assessment

The following table presents the weighted student response and exclusion rates for the 2009 science assessment. The exclusion rates give the percentage excluded, among all eligible students. Excluded students must necessarily be either students with disabilities (SD) or English language learners (ELL). The response rates indicate the percentage of students assessed among those who it was intended would take the assessment from within the participating schools. Thus students who were excluded are not included in the denominators of the response rates.

Weighted student response and exclusion rates for grade 12 public schools, national science assessment, by region: 2009

Region	Weighted student response rates (percent)	Weighted percentage of all students who are SD and excluded	Weighted percentage of all students who are ELL and excluded
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 National Science Assessment.
National	79.25	2.62	0.32
Northeast	74.50	2.21	0.59
Midwest	80.40	2.19	0.03
South	83.26	3.38	0.27
West	75.74	2.29	0.46

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