In november 2010 Andrei and Anna visited Portugal. Andre gave three talks on mathematical education: two in Lisbon and one in Oporto. Andre's visit was supported by Fundação Francisco Manuel dos Santos. In this connection FFMS published a book "Fazer contas ajuda a pensar?" One chapter of this book "A matemática escolar nos EUA e Rússia" was Portuguese translation of the English original written by A. Toom especially for this occasion.