Hutagalung, M.S. and Supardi U. S 2025. EFFECTIVENESS OF PROBLEM BASED INSTRUCTION (PBI) VS EXPOSITORY MODEL: A COMPARATIVE STUDY OF JUNIOR HIGH SCHOOL STUDENTS’ SPLDV PROBLEM SOLVING ABILITY . Academic Journal Research. 3, 2 (Jun. 2025), 173–177. DOI:https://doi.org/10.61796/acjoure.v3i2.357.