Crustal Evolution Education Project (CEEP) modules were designed to: (1) provide students with the methods and results of continuing investigations into the composition, history, and processes of the earth's crust and the application of this knowledge to man's activities and (2) to be used by teachers with little or no previous background in the modern theories of sea-floor spreading, continental drift, and plate tectonics. Each module consists of two booklets: a teacher's guide and student investigation. The teacher's guide contains all of the information present in the student investigation booklet as well as: (1) a general introduction; (2) prerequisite student background; (3) objectives; (4) list of required materials; (5) background information; (6) suggested approach; (7) procedure, recommending one 45-minute class period; (8) summary questions (with answers); (9) extension activities; and (10) list of references. To consider if dumping radioactive wastes in ocean trenches is feasible, students graph movement of a descending ocean floor plate and discuss that movement, explain why it would be good or bad to dump radioactive waste into ocean trenches, explain some of the effects that subducting plates have on edges of continents, and give reasons why disposing radioactive waste material is not an easy problem to solve. (Author/JN)