Because the international database is exceptionally large, it is often split into multiple "parts" for easier downloading. To access the contents, you must have all parts (e.g., part1, part2, etc.) in the same folder and use an extraction tool like WinRAR or 7-Zip on the first file.
: Information on national education policies and curricula. sc23890-TIMSS.part1.rar
Once extracted, the data is typically provided in formats compatible with major statistical software: TIMSS 2019 International Database you must have all parts (e.g.
: Detailed data from students, parents, teachers, and school principals regarding home environments and school climate. sc23890-TIMSS.part1.rar