The International Computer and Information Literacy Study (ICILS): U.S. ICILS 2018 restricted-use data files and documentation

The ICILS 2018 U.S. restricted-use student and school data files include U.S. specific variables that are not part of the ICILS 2018 U.S. public-use data files or the U.S. data files in the IEA's ICILS 2018 international database. They include NCES school IDs that facilitate merging with the Common Core of Data (CCD) for public schools and the Private School Universe Survey (PSS) for private schools. They are add-on files that do not contain weight variables or replicate weights, and therefore must be merged with the U.S. teacher and school data files in the international database before any analysis can be conducted. The U.S. data files in the international database can be downloaded from the IEA Data Repository https://www.iea.nl/data-tools/repository.