Gusliani, Ema, Kasman Ediputra, and Fadhilaturrahmi Fadhilaturrahmi. 2021. “Efforts to Increase Student’s Critical Thinking Ability Using Problem Based Learning Model for Elementary School Students”. Edumaspul: Jurnal Pendidikan 5 (2), 160-65. https://doi.org/10.33487/edumaspul.v5i2.2015.