Presented are a student workbook and teacher's manual for a unit which combines a study of water pollution with instruction in critical reading skills. In the two activities students study the types and effects of pollution in Lake Erie. At the same time they learn how to read critically, evaluate their reading skills, and analyze written material to determine the truthfulness and value of what is discussed. Included in the teacher's guide are an overview, objectives, suggested teaching approach, answers to review questions, and a list of references. (WB)