This high school environmental guide uses the Students Toward Environmental Participation (S.T.E.P.) approach. Activities are designed to develop an awareness of the purpose, interrelationship, and wholeness of the earth through activities, games and role-playing. Sample activities include: trust walk, scavenger hunt, nature collage, and alphabet animals. As a guideline for teaching the concepts of the guide, lessons use the structure provided by the S.P.I.C.E. (Similarities and Varieties, Patterns, Interaction and Interdependence, Continuity and Change, and Evolution and Adaption) strands. (Author/RH)