As World War I began, Frost returned to America in 1915 and bought a farm in New Hampshire, where he started a career of writing, teaching, and lecturing. This family homestead was the Frosts' summer home until 1938, and is used today as The Frost Place, a museum and poetry conference site. During the years 1916–20, 1923–24, and 1927–1938, Frost taught English at Amherst College in Massachusetts, notably encouraging his students to account for the sounds of the human voice in their writing.