TY JOUR TI Development of cognitive activity of primary school students in the learning process KW cognitive activity KW primary schoolchildren KW students KW active learning KW research KW problem KW education KW active methods KW training JO Journal of Pedagogical Studies AU Gukasova, G.R. AU Smorodinova, I.V. PY 2020 IS 5 PB INFRA-M Academic Publishing LLC.