sentences:  After leaving Union, York went on to found Clemmonsville High School, Olin High School, York Collegiate Institute, Ruffin-Badger Institute, and New Salem and Randleman High School in North Carolina.He published multiple English grammars and a "The Man of Business and Railroad Calculator", a text that taught arithmetic and basic legal principles.York became blind at the age of 48, symptoms of which had developed in one eye while he was working at Union.