Strategi Guru Menerapkan Positive Reinforcement dalam Meningkatkan Keaktifan Belajar Siswa Kelas II SD Muhammadiyah IV Pekanbaru. JPIM [Internet]. 2026 Aug. 28 [cited 2026 Sep. 17];3(02). Available from: https://ojs.ruangpublikasi.com/index.php/jpim/article/view/2628