Some 500 audio and videotapes, scripts, and transcriptions which are available to schools in the U.S. without charge are listed in this catalog. The materials are classified into 15 topics including environmental education, fine arts, health, home economics, industrial education, science and social studies. Each catalog entry describes the materials available, shows the approximate reading or listening time, and indicates the conditions of availability. For example, the title "Washington, the Servant, not Master, of the People", is listed as a 30 minute audiotape, available from the Georgetown University Forum, and is free for 45 days with the user paying return postage. The content of the tape is described in about 200 words. Many of the materials are available also in Canada. (MG)