“211. Meningkatkan Hasil Belajar Matematika Materi Simetri Putar Melalui Model Problem Based Learning (Pbl) Berbantuan Media Papan Siput Kelas III SD 1 Samirejo”, psnppg, vol. 1, no. 1, pp. 1888–1897, Jul. 2023, Accessed: Aug. 12, 2026. Available: https://conference.upgris.ac.id/index.php/psnppg/article/view/4275