After the war, Hapgood taught at Keystone College (1945–1947), Springfield College (1947–1952), Keene State College (1956–1966), and New England College (1966–1967), lecturing in world and American history, anthropology, economics, and the history of science.
college football | Eton College | University College London | Dartmouth College | King's College London | Harvard College | Trinity College | college | Oberlin College | Boston College | University College Dublin | Williams College | Vassar College | college basketball | Winchester College | Imperial College London | Collège de France | Middlebury College | Berklee College of Music | Royal College of Art | Smith College | Royal College of Music | Yale College | New College, Oxford | City College of New York | Amherst College | Magdalen College, Oxford | Kenyon College | Bowdoin College | Naval War College |