sentences:  In second grade, a teacher may use the Flow Map to sequence the stages and life cycle of a butterfly, while a high school chemistry teacher may use the same map to sequence the changing of an element from the periodic table.One teacher uses the map to illustrate a concrete idea, while another teacher uses the map to illustrate an abstract idea.When looking at the overarching theories of education, Thinking Maps fall into the Postmodern Constructivism theory.