Kozachenko, H. V., & Kozachenko, R. O. (2021). NON-FORMAL EDUCATION OF TEACHERS AS A WAY TO OVERCOME THE CHALLENGES OF DISTANCE LEARNING. Distance Education in Ukraine: Innovative, Normative-Legal, Pedagogical Aspects, 1(1), 173–175. https://doi.org/10.18372/2786-5495.1.15774