“Public vs. Private Schools: Pupils Perform Almost Equally”

Diana Jean Schemo:

The Education Department reported on Friday that children in public schools generally performed as well as or better than comparable children in private schools in reading and mathematics. The exception was in eighth-grade reading, where the private school counterparts fared better.
The report, which compared fourth- and eighth-grade reading and math scores in 2003 from nearly 7,000 public schools and more than 530 private schools, also found that conservative Christian schools lagged significantly behind public schools on eighth-grade math.
The study, carrying the imprimatur of the National Center for Education Statistics, part of the Education Department, was contracted to the Educational Testing Service and delivered to the department last year.

National Center for Education Statistics:

This study compares mean 2003 National Assessment of Educational Progress (NAEP) reading and mathematics scores of public and private schools in 4th and 8th grades, statistically controlling for individual student characteristics (such as gender, race/ethnicity, disability status, identification as an English language learner) and school characteristics (such as school size, location, and the composition of the student body). In grades 4 and 8, using unadjusted mean scores, students in private schools scored significantly higher than students in public schools for both reading and mathematics. But when school means were adjusted in the HLM analysis, the average for public schools was significantly higher than the average for private schools for grade 4 mathematics and not significantly different for reading. At grade 8, the average for private schools was significantly higher than the average for public schools in reading but not significantly different for mathematics. Comparisons were also carried out between types of sectarian schools. In grade 4, Catholic and Lutheran schools were compared separately to public schools. For both reading and mathematics, the results were similar to those based on all private schools. In grade 8, Catholic, Lutheran, and Conservative Christian schools were each compared to public schools. For Catholic and Lutheran schools for both reading and mathematics, the results were again similar to those based on all private schools. For Conservative Christian schools, the average adjusted school mean in reading was not significantly different from that of public schools. In mathematics, the average adjusted school mean for Conservative Christian schools was significantly lower than that of public schools.

Complete Report [680K PDF].
Leo Casey has more along with Kevin Drum.