 A branch of curriculum studies that investigates how society transmits culture from generation to generation has been tagged with the term "hidden curriculum" even though much of what is studied is hiding in plain sight.For instance, one of the 19th century founders of the discipline of sociology, Émile Durkheim, observed that more is taught and learned in schools than specified in the established curriculum of textbooks and teacher manuals.In "Moral Education" Durkheim wrote