Permatasari, A.A., Widiana, I.W. and Simamora, A.H. 2020. Tri Hita Karana Oriented Problem Based Learning Improves Natural Science Learning Outcomes. International Journal of Elementary Education. 4, 2 (Jul. 2020), 226–234. DOI:https://doi.org/10.23887/ijee.v4i2.25185.