Syafriani, Reni, and Hasanah Hasanah. “Meningkatkan Pemahaman Konsep IPA Melalui Model Pembelajaran Problem Based Learning Siswa Kelas IV UPTD SPF SD Negeri Pulo Sarok Singkil”. Indonesian Research Journal on Education 2, no. 2 (March 20, 2022): 526–540. Accessed October 6, 2026. https://irje.org/irje/article/view/293.