Hilma Innayah Putri, Keysha Kholillah Alqindy, Lisa Nabilah, Shafa Kamila Putri Anggraini, and Nurdiansyah. “Development of Problem-Based Learning Strategies to Deepen Elementary School Students’ Understanding of Social Studies Concepts”. COMPETITIVE: Journal of Education, vol. 4, no. 2, May 2025, pp. 97-106, doi:10.58355/competitive.v4i2.99.