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), 165-171. https://doi.org/10.24114/jmpsd.v2i1.61307