Febrianto, T., Ngabekti, S. and Saptono, S. 2021. The Effectiveness of Schoology-Assisted PBL-STEM to Improve Critical Thinking Ability of Junior High School Students. Journal of Innovative Science Education. 10, 2 (Aug. 2021), 222-229. DOI:https://doi.org/10.15294/jise.v9i3.42993.