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MENINGKATKAN HASIL DAN MINAT BELAJAR MATEMATIKA MELALUI OPTIMALISASI KERJA KELOMPOK PADA MODEL PROBLEM BASED LEARNING. psnppg. 2023;1(2):1277-1286. Accessed August 11, 2026. https://conference.upgris.ac.id/index.php/psnppg/article/view/5260