Efektivitas Penerapan Model Pembelajaran Problem Based Learning (PBL) Berbantuan Media Papan Bilangan Terhadap Pemahaman Konsep Nilai Tempat Siswa Kelas IV Sekolah Dasar. Sindoro [Internet]. 2026 Oct. 7 [cited 2026 Oct. 17];18(11). Available from: https://journal.cib.institute/index.php/sindoro/article/view/4954