00741naa#a2200193#i#450# EN\\bibl\121315 20260516100757.6 1994-4683 20230803b2023####ek#y0engy0150####ca RU SOCIAL ACTIVITY DEVELOPMENT OF HIGH SCHOOL STUDENTS AS A PSYCHOLOGICAL AND PEDAGOGICAL PROBLEM Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2023 3 с. Journal article local Общая теория воспитания и обучения. Отдельные направления педагогики. 37.013 uchzapiski.lesgaft.spb.ru