This special issue is dedicated to the 3rd Estoril Vigotsky Conference — the biannual international scientific event held in Estoril, Portugal on 16-18 June 2014. The organizing committee honored the wide impact of Lev Vygotsky’s works on contemporary psychology and included Vigotskyan League of Portuguese Language and the Institute Quintino Aires, in collaboration with the Lomonosov Moscow State University, the Russian University of Humanities (Russia, Moscow), IPAF — Instituto Vigotsky (São Paulo, Brazil) and Andricard (Luanda, Angola). The editorial board of our journal is very grateful to Professor Quintino-Aires for organization of this outstanding conference and to Professor Margarida César for contribution to this special issue.
