“Efektivitas Penerapan Model Pembelajaran Problem Based Learning (PBL) Berbantuan Media Papan Bilangan Terhadap Pemahaman Konsep Nilai Tempat Siswa Kelas IV Sekolah Dasar”, Sindoro, vol. 18, no. 11, Oct. 2026, Accessed: Oct. 17, 2026. [Online]. Available: https://journal.cib.institute/index.php/sindoro/article/view/4954