“DEVELOPMENT OF BIG BOOK LEARNING MEDIA TO TRAIN STUDENTS’ THINKING SKILLS IN THEME 1 SUBTHEME 1 FOR FIFTH GRADE ELEMENTARY SCHOOL STUDENTS” (2024) Jurnal Merah Putih Sekolah Dasar, 2(1), pp. 165–171. doi:10.24114/jmpsd.v2i1.61307.