William Wirt, a student of John Dewey who became the superintendent of schools in Gary, Indiana in 1908, was one of the first educators to use a bell to signal the changes between classroom periods.

Interesting juxtaposition of the height of academia and pop stardom of his day.

John Dewey (/ˈduːi/; October 20, 1859 – June 1, 1952) was an American philosopher, psychologist, and educational reformer whose ideas have been influential in education and social reform. He was one of the most prominent American scholars in the first half of the twentieth century. #

Hubert Prior Vallée (July 28, 1901[1] – July 3, 1986), known professionally as Rudy Vallée, was an American singer, musician, actor, and radio host. He was one of the first modern pop stars of the teen idol type. #

theory

These three visions are also present in his book Democracy and Education. In which, Dewey intertwined both concepts arguing that a democracy is impossible if people remain ignorant to their civic and societal duties. He argues that the education field must favor collaboration and modeling a true democracy.

Freire