Nufus, F. et al. 2022. Study of ISLE-BASED STEM Approaches and Models in Its Use for Teacher Professionalism Development in Geometric Optical Case Studies. Jurnal Penelitian Pendidikan IPA. 8, 2 (Apr. 2022), 681–686. DOI:https://doi.org/10.29303/jppipa.v8i2.1352.