Indriyana, Riyani Septi, and Susilowati Susilowati. 2020. “The Effects of Model Project-Based Learning Approach on STEM (Science, Technology, Engineering, Mathematic) on Natural Science Learning to Junior High School Student’s Critical Thinking Skills And Cooperative Skills at SMP N 1 Berbah”. Journal of Science Education Research 4 (2):70-75. https://doi.org/10.21831/jser.v4i2.35717.