 He continued to teach art and design, at the Dundee YMCA, the University and the art school at Dundee Technical Institute.He also created Dundee's first design collective by gathering together a group of young talents who created and exhibited decorative art and design pieces for the Graphic Arts Association, including Nell Baxter, Rosa Baxter, Elizabeth Burt and Duncan's sister Jessie Westbrook.Thanks to Patrick Geddes's influence, in 1900 Duncan was appointed as a Professor at the Chicago Institute founded by Francis Wayland Parker.