1896 - Chicago Laboratory School, by John Dewey, Anna Bryan, Patty Smith Hill and G. Stanley Hall

The Laboratory Schools were founded by American educator John Dewey in 1896 in the Hyde Park neighborhood of Chicago. Calvin Brainerd Cady was director of the music department under Dewey. The school began as a progressive educational institution that goes from nursery school through 12th grade.

See more at: https://en.wikipedia.org/wiki/University_of_Chicago_Laboratory_Schools