NAEP Technical DocumentationFourth-Grade Charter School Sample

Another new feature in the 2003 state assessment was the introduction of a national sample of charter schools for fourth grade. Several states in the assessment were targeted for an oversampling of charter schools, supplementing information for charter schools that came into the state assessment sample.

The requirement for a national sample of charter schools in fourth grade affected the state samples in three states: California, Michigan, and Texas. In these three states, the student sample size targets for charter schools are shown in the table below. In addition, the sampling rates for charter schools in these three states were adjusted to meet these targets. The sampling proportionality constants associated with these adjusted sampling rates are also shown in the table.

Target sample sizes and sampling proportionality constants for fourth grade charter school oversample study, state assessment, by state: 2003
State	Target sample size	Sampling proportionality constant
California	1700	0.0027526018
Michigan	1020	0.0028775899
Texas	400	0.0027441411
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2003.

As with the Trial Urban District Assessment (TUDA) districts, because of the overlap with the State NAEP jurisdiction samples, the school sample sizes in these states are somewhat higher than if there had been no special charter school study. In some states there were distinct sampling rates for the following schools:

TUDA district schools,
fourth-grade charter schools, and
all other schools in the state.

For any school that belonged to more than one of these groups (e.g., fourth-grade charter schools in San Diego, California) for which different sampling rates were set, the school was sampled at the highest applicable rate.

Last updated 09 May 2008 (GF)

Printer-friendly Version