TASYA NATALI SIHOMBING; PARGAULAN SIAGIAN. Improving Learning Outcomes Of Class X Students In Mathematics Learning At SMA Negeri 2 Medan Through The Group Investigation (GI) Type Cooperative Model. JURNAL RISET RUMPUN ILMU PENDIDIKAN, [S. l.], v. 2, n. 2, p. 182–198, 2023. DOI: 10.55606/jurripen.v2i2.1585. Disponível em: https://prin.or.id/index.php/JURRIPEN/article/view/1585. Acesso em: 22 may. 2024.