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NAEP Technical DocumentationWeighted Student Response and Exclusion Rates for the 2009 Private School National Science Assessment

The following table presents the weighted student response and exclusion rates for the 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 private schools, science assessment, by grade and school type: 2009

Grade and private school type	Weighted student response rate	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.
Fourth grade
All private	95.92	0.09	0.05
Catholic	95.59	0.06	0.00
Non-Catholic private	96.31	0.12	0.09
Eighth grade
All private	94.90	0.31	0.16
Catholic	95.14	0.11	0.18
Non-Catholic private	94.58	0.51	0.15
Twelfth grade
All private	87.68	0.26	0.09
Catholic	87.41	0.25	0.00
Non-Catholic private	88.04	0.28	0.21

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