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Spellbound says
Both of them advocated free education.
Under the Tsars education was mostly in the hands of the Church, and literacy rates were very low (56% in 1914), although this was improving. As Marxists, both Lenin and Stalin believed that the destiny of the country lay in the hands of the working class, and, if they were to be effective rulers, then they needed to be educated. Education was free, there were no privately owned schools or colleges after the October Revolution, all the way to university.
It must be stressed, however, that party members, especially high ranking ones, had access to better equipped and staffed schools than most ordinary Soviet citizens.
The Wikipedi article is very good, see: http://en.wikipedia.org/wiki/Education_in_the_Sov…