<Li> Robert M. La Follette </Li> <Li> John Stuart Mill </Li> <Li> William Howard Taft </Li> <Tr> <Td> By region (show) <Ul> <Li> In the Muslim world </Li> <Li> In South Korea </Li> <Li> In the United States </Li> </Ul> </Td> </Tr>

What individual below is considered the leader of progressive education in america