The use of digital tools by secondary school teachers for the implementation of distance learning in the context of digital transformation in Ukraine. - Oksana V. Ovcharuk; Andrii M. Gurzhii; Iryna V. Ivaniuk; Liubov A. Kartashova; Olena O. Hrytsenchuk; Tetiana A. Vakaliuk; Mariya P. Shyshkina (CTE, 2021)