TY JOUR TI Research Activities As a Mean of Intellectual Development of Primary Schoolchildren KW younger schoolchild; learning process; search and research activities; intellectual development; subject achievements; metasubject achievements; Federal state educational standard for primary general education JO Primary Education AU Vinogradova, N.F. AU Rydze, O.A. PY 2021 IS 9 PB INFRA-M Academic Publishing LLC.