Abstract
O UTDOOR BIOLOGY INSTRUCTIONAL STRATEGIES (OBIS) is an experiential, outdoorbased, group-oriented program established in the summer of 1972. OBIS, located at the Lawrence Hall of Science, University of California, Berkeley, is supported by a grant from the National Science Foundation. The project's goal is to develop activities which encourage middle-school-aged youngsters to explore biological phenomena outdoors in order to observe and understand how the ecosystem functions. OBIS is not primarily a school classroom curriculum; it is a community-oriented project directed toward YMCA camps, junior museum groups, after-school ecology clubs, scouts, church youth groups, nature centers, and other organizations of 10-15-year-olds. Because OBIS is attempting to bring program materials to a diverse group of users whose leaders are assumed to have no training in natural history or biology, the activities must be clear and concise, interesting to the participating youngsters, and independent of the background and training of the leader. In order to achieve these goals, evaluation must be an essential part of OBIS activity development. In this paper we will describe how OBIS develops an activity, discuss the OBIS evaluation of some OBIS lawn activities, and discuss the role of evaluation in development of the format presently used by OBIS.
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