The major environmental problem of acid precipition is addressed through a series of activities contained in this guide for teachers of grades 6 through 12. Exercises are provided to help students learn science inquiry skills, facts, and concepts while focusing on the acid rain situation. Activities are organized by content areas. These include: (l) biological sciences (investigating the effects of acid rain on beans, seedlings, radishes, amphipods, earthworms, and hay infusions); (2) earth science (working with rocks, soil and weather conditions); (3) physical sciences (dealing with logarithms to express the pH scale, carrying out monitoring projects on anthrogenic emissions); and (4) social sciences (focusing on analysis of cartoons on acid rain and survey sampling). Each activity contains background information, objectives, needed materials, and guidelines for the teachers as well as student instruction and/or data sheets, and tests on each activity. (ML)