Student Achievement Data Files for TIMSS 2023 Grade 4 R package K4PrestasiSiswa version 0.1.0 The official Trends in International Mathematics and Science Study (TIMSS) 2023 website provides Student Achievement Data Files for Grade 4 in RData format. However, the available data are presented solely as numerical values. This package transforms the numerical data into categorical variables, enabling clearer interpretation and reducing ambiguity in statistical analysis. The category labels are provided in Bahasa Indonesia. This initiative contributes to promoting the use of Bahasa Indonesia in programming, in line with its designation as one of the official languages of the United Nations. For more details see <https://timss2023.org/>. Software Fadhlul Mubarak <mubarakfadhlul@gmail.com> Comprehensive R Archive Network (CRAN) Fadhlul Mubarak [aut, cre] (ORCID: <https://orcid.org/0000-0001-7394-3817>), Vinny Yuliani Sundara [aut] (ORCID: <https://orcid.org/0000-0002-9137-8185>), Nurniswah [aut] (ORCID: <https://orcid.org/0000-0003-4343-3853>), Fakhrur Razi [aut] (ORCID: <https://orcid.org/0009-0005-8741-2212>) GPL-3 2026-04-28 application/tgz https://CRAN.R-project.org/package=K4PrestasiSiswa doi:10.32614/CRAN.package.K4PrestasiSiswa