A team-teaching program in ninth-grade world history at the Acton-Boxborough Regional High School in Acton, Massachusetts, is described. Developed by the teachers who share the course, the program emphasizes flexibility in classroom arrangement and learning group size in order to serve the needs of individual students. The goals of the team program stress the effectiveness of allowing a variety of learning styles, development of individual skills relevant to the curriculum, and more efficient use of teachers' time and resources. For each of 12 units, the objectives, class schedule, and required materials are described. Content ranges from primitive societies through the Renaissance to postindustrial change, nationalism, and internationalism. Interesting teaching ideas include the study of archaeological site diagrams, comparison of 1970 U.S. statistics with characteristics of the late Roman Empire, and mapping of the classroom in order to comprehend the technical problems encountered by explorers during the Age of Discovery. Course materials include films, filmstrips, slides, audio- and videotapes, photos and art prints, and a reading list. (AV)