Bayu, A. K., S. Sukardi, and U. Rudati. “PROBLEM BASED LEARNING MODEL TO IMPROVE SCIENCE LEARNING OUTCOMES OF FOURTH GRADE SDN BANGUNHARJO”. PROGRES PENDIDIKAN, vol. 6, no. 2, May 2025, pp. 134-9, doi:10.29303/prospek.v6i2.1208.