Saruksuk, F. W. H., Sihombing, L. N., & Sijabat, D. (2023). The Influence of Numbered Head Together (NHT) Cooperative Learning Model on Student Learning Outcomes Theme 2 Subtheme 1 "Harmony in Differences" in Class VI Students at UPTD SD Negeri 124385 Pematang Siantar. International Journal of Global Sustainable Research, 1(2), 217–224. https://doi.org/10.59890/ijgsr.v1i2.648