This summer some 330 high school students will build trails in parks and national forests as volunteers for the Student Conservation Association. But their minds require a workout, too. The non-profit SCA needs people to visit backcountry crews and spend time talking to them about natural resource issues. Previous "Educators Bureau" speakers have shared information about local geology and history, regional water quality issues and even jobs with environmental organizations. For more information contact Rob Bleiberg, SCA Southwest Office, P.O. Box 925, Boulder, CO 80306 (303/786-7667).