This study aims to explore how the group investigation model could be used to improve student learning results in social studies courses. This study was a two-cycle classroom action research study. Six students of class IV from SDN Inti Sungai Miai 11 Banjarmasin participated in this study for the 2020/2021 academic year. Data were collected using observation techniques on implementing lesson plans and student activities and testing on student learning outcomes. The student standard score was ≥ 70, and the expected classical success indicator was 81%-99%. According to the research findings, teacher activity received a score of 90.625 on very good criteria. With practically all active criteria, student activity improved to 85.7%. Individual learning outcomes showed that five students with a classical completeness of 83.33% were nearly entirely complete. Based on these findings, it was possible to conclude that using the Group Investigation model could increase student learning outcomes in social studies courses.
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