This document contains most of the materials needed to use the exercise. the main part of the document is the instructor's copy. It tells how to use the exercise, presents the objectives, the master answer sheet, the scoring key, and discussion notes to be used following the exercise. The next section summarizes results from field tests of the exercise, and reports the miners' evaluation of the activity. the last part of this document is three appendices. Appendix a is the exercise problem booklet. This booklet can be duplicated locally. the booklets are reusable. One is needed for every person in the classroom. appendix b is the answer sheet. Copies of this answer sheet must have the latent image (invisible) ink answers that appear in appendix C printed on them. Answer sheets are consumable. One is needed for each person or each small group of persons who work the exercise.