Constructivisim Theory of Social Development - Lev Vigotsky; Zone of Proximal Development By sonwabo zondi Period: 1896 BCE to 1934 BCE Constructivisim Theory of Social Development - Lev Vigotsky; Zone of Proximal Development Theory of Social Development 1925 Constructivisim Theorists Timeline Lev Vigotsky - Theory of Social Development Zone of Proximal Development