Hilma Innayah Putri, Keysha Kholillah Alqindy, Lisa Nabilah, Shafa Kamila Putri Anggraini, Nurdiansyah. Development of Problem-Based Learning Strategies to Deepen Elementary School Students’ Understanding of Social Studies Concepts. competitive [Internet]. 2025 May 9 [cited 2025 May 22];4(2):97-106. Available from: https://competitive.pdfaii.org/index.php/i/article/view/99