​​​​​​​​​NAEP Technical DocumentationSchool Sample Sizes: PSS-Based and New-School for the 2024 Fourth- and Eighth-Grade Private School National Assessment in Mathematics and Reading

The following table presents the number of schools selected for the fourth- and eighth-grade private school mathematics and reading samples by sampling frame (Private School Universe Survey [PSS]-based and new-school) and private school affiliation.

Number of schools in the total, PSS-based, and new-school samples, national private assessment, by grade and school type: 2024
Grade and private school type Total school samplePSS-based school sampleNew-school sample
Grade 4
All private39038010​
Catholic12012010
Non-Catholic 24024​0 †
Unknown affiliation2020 †
Grade 8
​All private38037010
Catholic11011010
Non-Catholic 24024​0 †
Unknown affiliation3030 †

​† Not applicable.
NOTE: Numbers of schools are rounded to nearest ten. Detail may not sum to totals due to rounding.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2024 ​National Mathematics and Reading Assessments.

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Last updated 02 December 2025 (ML)
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