Mar Atus Solihah F, Bintaro TY. IMPLEMENTATION OF A PROBLEM-BASED LEARNING MODEL USING POP-UP BOOKS TO INCREASE STUDENTS’ MOTIVATION AND ACHIEVEMENT IN NATURAL SCIENCE SUBJECTS. Proceeding Internasional Conference on Child Education [Internet]. 2023 Jul. 22 [cited 2025 Jul. 7];1(1):491-504. Available from: https://proceeding.unimar.ac.id/index.php/icce/article/view/51