Popovych, I., Kokorina, Y. , Pyslar, A. , Palchynska, M. , Pavliuk, M. , Raіevska Y. and Torop, K. 2022. Research of the Mental States of Anxiety of Fourth-Graders in Secondary Schools during the Progression of the COVID-19 Pandemic. Revista Romaneasca pentru Educatie Multidimensionala. 14, 1 (Feb. 2022), 32-51. DOI:https://doi.org/10.18662/rrem/14.1/506.