What is "herbartianism"

Herbartianism is an educational philosophy, movement, and method loosely based on the educational and pedagogical thought of German educator Johann Friedrich Herbart, and influential on American school pedagogy of the late 19th century as the field worked towards a science of education. Herbart advocated for instruction that introduced new ideas in discrete steps. About a quarter-century after his death, Herbart's ideas were expanded in two German schools of thought that were later embodied in the method used at a practice school in Jena, which attracted educationists from the United States. Herbartianism was later replaced by new pedagogies, such as those of John Dewey.