Widyatama GS, Wulandari D. Development of Problem-Based Learning Based Flipbook Teaching Materials to Improve Understanding of IPAS in Grade V Elementary School Students. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2025 Mar. 25 [cited 2025 May 31];11(3):854-66. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/10968