DEVELOPMENT OF BIG BOOK LEARNING MEDIA TO TRAIN STUDENTS’ THINKING SKILLS IN THEME 1 SUBTHEME 1 FOR FIFTH GRADE ELEMENTARY SCHOOL STUDENTS. Jurnal Merah Putih Sekolah Dasar, The Indonesian Journal of Primary School Education [Internet]. 2024 Oct. 1 [cited 2026 Mar. 21];2(1):165-71. Available from: https://jurnal.unimed.ac.id/2012/index.php/jmpsd/article/view/61307