USSR provided free education to all citizens resulting in literacy rising from 33% to 99.9%:
http://www.revolutionarydemocracy.org/archive/PubEdUSSR.htm
http://www.revolutionarydemocracy.org/archive/anglosov.htm
http://unesdoc.unesco.org/images/0000/000013/001300eo.pdf
Soon after formation, adult education schools popped up in every town and every village.