“215. Penerapan Model Pembelajaran Problem Based Learning Untuk Meningkatkan Hasil Belajar Matematika Kelas Iv SDN Sitirejo”, psnppg, vol. 1, no. 1, pp. 1922–1930, Jul. 2023, Accessed: Aug. 11, 2026. Available: https://conference.upgris.ac.id/index.php/psnppg/article/view/4244