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“THE EFFECT OF THE PBL LEARNING MODEL BASED ON SCIENCE, TECHNOLOGY, ENGINEERING, MATHEMATICS (STEM) ON THE COGNITIVE ABILITIES OF JUNIOR HIGH SCHOOL STUDENTS 1 BASA AMPEK BALAI TAPAN”, universe, vol. 3, no. 1, pp. 14–19, Jul. 2022, doi: 10.24036/universe.v3i1.134.