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- Beginning Teacher Longitudinal Study (BTLS) Waves 1-5 Restricted-Use Data File and Documentation
Beginning Teacher Longitudinal Study (BTLS) Waves 1-5 Restricted-Use Data File and Documentation
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This restricted-use CD includes the combined wave 1 through wave 5 data file, questionnaires, codebook, file layout, and User’s Manual. The data files are in SAS and ASCII formats, with syntax for creating files in SPSS and STATA. The codebook contains the count of responses for each data item. The User's Manual explains the survey methodology and provides other information about the structure and content of the data file.
Detailed Methodology
SASS used a stratified probability sample design to ensure that the samples of schools, principals, teachers, districts, and school library media centers contained sufficient numbers for reliable estimates. Public and private schools were oversampled into groups based on certain characteristics. After schools were stratified and sampled, teachers within the schools were also stratified and sampled based on their characteristics.