BartoszewiczM., GulińskaH. and GaidovaM. 2020. The Use of E-Learning Platform by Flipped Classroom Method in Chemistry Lessons in Poland and Ukraine – Case Study. International Journal of Research in E-learning. 6, 1 (Jun. 2020), 1-12. DOI:https://doi.org/10.31261/IJREL.2020.6.1.10.