3 VOLUME SET of Challenge Newsletter Anthology- Challenge was a bi-monthly newsletter dealing with physical education, recreation, camping, outdoor, education and related areas for the mentally retarded. The Best of Challenge Volumes also contain a few entries from Outlook, a newsletter dealing with programs for individuals with conditions other than mental retardation such as polio, cerebral palsy, deafness, blindness, amputations, emotionally disturbed and orthopedically handicapped.