TY JOUR TI Analyses of the Features of General Schooling of Russian Younger Schoolchildren in Accordance to the Results of International Research TIMSS-2015 (Mathematics) KW international monitoring study TIMSS; fourth grade schoolchildren; Federal state educational standard of primary education; universal learning activities; mathematics; typical difficulties of general educatoin nature. JO Primary Education AU Rydze, O.A. PY 2017 IS 5 PB INFRA-M Academic Publishing LLC.