14 августа 1930 года в СССР принято постановление «О всеобщем обязательном начальном обучении»

In accordance with the decree, all the children aged 8 to 10 had to go to school beginning 1 September 1930. Beginning the same year, industrial cities and workers settlements started introducing the universal seven-year education. Willing or not, everyone went to school by 1934.