The present invention entails a teaching device for severely retarded and physically handicapped individuals. A separable teaching board is provided which includes a plurality of detachable board sections. Each board section includes indented cutouts formed in the face thereof, with the indented cutouts...http://www.google.fr/patents/US4478583?utm_source=gb-gplus-shareBrevet US4478583 - Teaching device for severely retarded or physically handicapped
Teaching device for severely retarded or physically handicapped
