Ramadhani, Andin Oktovania, Anggun Khoirin Nisa’, Nirma Alimatulhana, Moh. Rizky, and Putri Rahadian Dyah Kusumawati. “The Effect of the Problem-Based Learning (PBL) Model Combined With Laboratory Experiments on Students’ Level of Understanding of the Topic of Changes in the State of Matter in Elementary School”. Primer Edukasi Journal 6, no. 1 (August 9, 2026): 80–87. Accessed September 12, 2026. https://www.jurnal-inais.id/index.php/JPE/article/view/1137.