“338. Peningkatan Hasil Belajar Matematika Menggunakan Model PBL Berbantuan Media Papan Penjumlahan dan Pengurangan di SD 2 Mijen”, psnppg, vol. 1, no. 1, pp. 3014–3022, Jul. 2023, Accessed: Aug. 11, 2026. Available: https://conference.upgris.ac.id/index.php/psnppg/article/view/4261