Guidelines for environmental organizations who wish to establish student internships or use interns more effectively are presented, based on 1983-1984 interviews and surveys of environmental group representatives. While the focus is on internships for undergraduate and graduate students, environmental interns may be recent college graduates, high school students, or career changers. The internship is short-term (1 month to 1 year), part- or full-time, and is often part of a student's educational program. Interns can help environmental groups with: research, fund raising, newsletters, lobbying, public awareness and educational programs, membership development, and coordination of volunteers. Information is provided on: why students want internships with environmental groups, reasons schools support internships, identifying good intern projects, defining tasks before recruiting interns, locating and selecting qualified students, making arrangements such as learning agreements, considerations regarding compensation for interns, federal college work-study programs, award of academic credit, orientation, supervision, evaluation, establishing ongoing relationships with the schools and key individuals to contact, and assistance provided by the National Society for Internships and Experiential Education. (SW)