Lev Semyonovich Vygotsky (Russian: Лев Семёнович Выготский, [vɨˈɡotskʲɪj]; Belarusian: Леў Сямёнавіч Выгоцкі; November 17 [O.S. November 5] 1896 – June 11, 1934) was a Russian and Soviet psychologist,...