The literacy ratio when MGR came to Power increased dramatically, it is due to his various free schemes he announced out of that his Powerful weapon to eradicate he came out with Noon Meal Scheme, though it was already implemented in Late 1950s the scheme was dropped due to lack of economcial support.
MGR know that children will get atleast one time meal so that their parents would send them to school. It worked as desired. Even now the Noon Meal Scheme continues.
A detail insight is given by Mr.Krish, the link is http://krishworld.com/politics/krish/indian-politics/pro-poor-programs-in-tamilnadu/
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