NAEP - Reading 2007: National Participation Rates

National participation rates in reading

The school participation rate for the reading assessment was 98 percent (100 percent for public schools and 78 percent for private schools) at grade 4 and 97 percent (100 percent for public schools and 74 percent for private schools) at grade 8. To ensure unbiased samples, NCES statistical standards require that nonresponse bias analyses be conducted for any school or student group with a participation rate that falls below 85 percent. The results showed that school substitution and nonresponse adjustments were effective in reducing the observable nonresponse bias for private schools.

National school and student participation rates in NAEP reading at grades 4 and 8, by type of school: 2007
Grade	Type of school	Percent before substitution	Percent after substitution	Percent before substitution	Percent after substitution	Number of schools participating after substitution	Student- weighted percent	Number of students assessed
		School participation					Student participation
		Student-weighted		School-weighted		Number of schools participating after substitution	Student- weighted percent	Number of students assessed
4	Nation	98	99	92	95	7,830	95	191,000
	Public	100	100	100	100	7,310	95	183,400
	Private	78	87	71	81	290	96	3,400
8	Nation	97	98	87	90	6,930	92	160,700
	Public	100	100	100	100	6,410	92	154,700
	Private	74	82	67	76	360	96	3,300
NOTE: The national totals include Department of Defense Education Activity (overseas and domestic schools) and Bureau of Indian Education schools, which are not included in either the public or private totals. The numbers of schools are rounded to the nearest ten, and the numbers of students are rounded to the nearest hundred.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2007 Reading Assessment.

The student-weighted school participation rates are calculated based on the estimated number of students represented by either the initially selected schools that participated in the assessment (before substitution) or the participating schools, whether originally selected or selected as a substitute for a school that chose not to participate (after substitution). The school-weighted school participation rates are calculated based on the estimated number of schools either before or after substitutions.

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