The Braille system was devised by the Frenchman in 1821 after he tried a system of "Night writing" developed by Charles Barbier. He simplified the version and revolutionized written communication for the visually impaired.
When Louis Braille was 15 years old, he developed an ingenious system of reading and writing by means of raised dots. Today, in virtually every language throughout the world, Braille is the standard form of writing and reading used by blind people.
Susan Blow - In she fought to bring kindergarten into the St. Louis Public Schools, making St. Louis the first school district in the nation to offer kindergarten. By the time of her death in more than 400 cities had kindergartens in the public schools.