If students are to become aware of the vital, but fragile, interrelationships in their environment, they require many firsthand experiences in the out-of-doors. Environmental education is taught in some classrooms and nature centers, but to date, little research has been conducted to evaluate the effectiveness of the instructional methods used. Nature center managers are finding it difficult to personally educate an increasing number of park visitors. School teachers who may lack expertise in the natural sciences need educational resources that can be used to supplement their science curricula. These situations indicate that there is a growing demand for environmental interpretive methods that are dynamic, convenient, and accessible to a large number of people.The purpose of this study is to evaluate the effectiveness of a particular method of interpretation which involves the use of a taped message and hands-on activities along a nature trail. Middle school students took part in the project. The treatment for the experimental group consisted of taped instruction and nature trail activities. The control group toured Christy Woods Arboretum without a taped message. Both groups completed a short written questionnaire after theirexperience. Responses were analyzed to determine if the taped interpretive method was effective in helping students learn concepts and develop positive attitudes toward the natural environment. Teacher response was also evaluated.