“233. Peningkatan Hasil Belajar Siswa Melalui Model Problem Based Learning pada Materi Bangun Datar Kelas 1”, psnppg, vol. 1, no. 1, pp. 2075–2083, Jul. 2023, Accessed: Aug. 11, 2026. Available: https://conference.upgris.ac.id/index.php/psnppg/article/view/4281