“THE EFFECT OF IMPLEMENTING PROBLEM-BASED LEARNING ON THE FIFTH GRADE STUDENTS’ HIGHER ORDER THINKING SKILLS ON HEAT AND TRANSFER THEME AT SDN KEPATIHAN 06 JEMBER”, JPFKIP, vol. 9, no. 4, pp. 482–491, Aug. 2020, doi: 10.33578/10.33578/jpfkip.v9i4.7959.