Under his leadership the School developed an international reputation and was associated with the flourishing of Glasgow Style and the work of Charles Rennie Mackintosh and his circle.
Newbery helped commission Mackintosh as architect for the now famous School of Art building and was actively involved in its design.
Born in Devon to a shoemaker and his wife, Newbery went to school in Bridport, Dorset, where he qualified as a teacher, and later as an art master.
Overall, he wanted students to have a strong training in traditional techniques, while developing their unique individual talent.
His reputation as a successful director was enhanced by the high profile of various Glasgow artists of the 1890s and early 20th century whose development he had fostered.