Anggara, M., & Samsudin, A. (2023). APPLICATION OF PROJECT BASED LEARNING MODELS TO KNOW THE DESCRIPTION OF UNDERSTANDING CONCEPTS OF SUMMARY IN CLASS 1 ELEMENTARY SCHOOL STUDENTS: project based learning model, understanding the concept of addition, 1st grade elementary school students. Sebelas April Elementary Education, 2(1), 62–71. Retrieved from https://ejournal.lppmunsap.org/index.php/saee/article/view/600