Handayani U, Sumaji, Khamdun. The Effectiveness of PBL and PjBL Models on Students’ Science Learning Outcomes in Material Properties of Elementary School Students . UJSSH [Internet]. 2024 Jul. 5 [cited 2025 Aug. 28];3(1):144-9. Available from: https://ujssh.com/index.php/ujssh/article/view/124