To make sure that the samples contain sufficient numbers for estimates, SASS uses a stratified probability sample design. Public and private schools are oversampled into groups based on certain characteristics. After schools are stratified and sampled, teachers within the schools are also stratified and sampled based on their characteristics.
Due to the relatively few numbers of these schools, all schools funded by the Bureau of Indian Affairs are included as part of the public sector in the 2003-04 SASS. For more details on sampling, see the Methods and Procedures page.
