Presented in this unit are three activities concerning the causes and effects of oil spills and methods used to clean up these spills in the oceans and Great Lakes. Students construct and interpret a graph showing oil pollution sources. The students create and try to clean up a small-scale oil spill in a pan, and they compare the water quality of clean and oily water. Both a teacher's guide and a students' guide are provided. Included in the teacher's manual are a materials list, objectives, recommended teaching approaches, evaluation items, and answers to questions contained in the student workbook. (Author/WB)