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Gr 7 Up—This documentary is a heart-warming account of the relationship between Penny Patterson, a psychologist, and her pupil for more than 40 years, Koko the gorilla. In 1971, Patterson, a student at Stanford University, asked the San Francisco Zoo authorities for permission to teach sign language to one of their gorillas. She was interested in bridging the communication gap between humans and animals. Her scientific experiment in teaching sign language to a baby gorilla turned into a lifelong commitment. However...Log In or Sign Up to Read More