Pitt, W. D. (1970). The development of multi-level audio-visual teaching aids for earth science. ERIC Document ED 050 943.

The project consisted of making a multi-level teaching film titled Rocks and minerals of the Ouachita mountains, which runs for 25 minutes and is in color. The film was designed to be interesting to earth science students from junior high to college, and consists of dialogue combined with motion pictures of charts, sequential diagrams, outcrops, and aerial views. The film was produced inexpensively and "the variety of illustration types used in this film is believed to be somewhat unique and represents a different approach to education films about geology." The film was rated by groups of earth science students, college, high school, and junior high. Both the rating questionnaire and the resulting data are included in the report showing generally a positive response to the film. A list of general suggestions in making geology films is provided.