TY JOUR TI The Use of Non-Standard Problems with Matches When Teaching Younger Schoolchildren KW Primary School; methods of teaching mathematics; non-standard tasks; symbolic means of information presentation; classification of problems with matches; modeling; development of abilities for independent intellectual activity JO Primary Education AU Pavlova, O.A. AU Surovceva, A.O. AU Yakushkina, E.V. PY 2021 IS 9 PB INFRA-M Academic Publishing LLC.