Roslina, R., Liliawati, W., & Hasanah, L. (2024). PROJECT BASED LEARNING WITH STEM APPROACH TO ALTERNATIVE ENERGY MATERIAL AS EFFECTIVE LEARNING TO IMPROVE PROBLEM SOLVING SKILLS. Phenomenon : Jurnal Pendidikan MIPA, 13(2), 145-156. doi:https://doi.org/10.21580/phen.2023.13.2.16609