TY JOUR TI Elimination of Difficulties in Teaching Primary School Students by Means of Controlling Metasubject Achievements KW younger schoolchildren; metasubject learning outcomes; the formation of universal educational actions; control; pedagogical diagnostics; self-control; analysis; correction of educational activities; test tasks JO Primary Education AU Petrashko, O.O. PY 2021 IS 9 PB INFRA-M Academic Publishing LLC.