Mary Ellen Richmond (1861–1928) formulated the first comprehensive statement of direct social work practice principles. She founded the Public Charities Association, the juvenile court, and the Housing Association, and helped to develop teaching materials for Charity Organization Societies nationwide.
John F. Longres
Larraine M. Edwards
Kenneth Pray (1882–1948), a leader in social work education, worked for the Public Charities Association and was interested in prison reform. He also served as director of social planning and administration at the University of Pennsylvania's School of Social Work.