“THE EFFECT OF DISCOVERY LEARNING AND THINK PAIR SHARED LEARNING MODELS ON STUDENTS’ ACHIEVEMENT IN SCIENCE AT GRADE IV ELEMENTARY SCHOOL (IN THE VIEW OF LEARNING MOTIVATION)” (2020) Primary: Jurnal Pendidikan Guru Sekolah Dasar, 9(6), pp. 797–806. doi:10.33578/jpfkip.v9i6.8046.