Halsted ging an das St. John´s College in Annapolis, 1903 bis 1906 war er am Kenyon College in Gambier in Ohio und danach bis 1914 am Colorado State College of Education in Greeley. ###>He completed his teaching career at St. John's College, Annapolis; Kenyon College, Gambier, Ohio (1903-1906); and the Colorado State Teachers College, Greeley (1906-1914).