Bangun Munthe; Imelda Butarbutar; Justinos Ray Nainggolan; Josua Manurung; Yuliana Simbolon. THE EFFECT OF THE JIGSAW TYPE COOPERATIVE LEARNING MODEL ON IMPROVING STUDENTS’ AFFECTIVE LEARNING OUTCOMES HKBP PRIVATE VOCATIONAL SCHOOL PEMATANGSIANTAR. MORFAI 2025, 6, 855-864.