The unit provides teachers and other educators with classroom lessons that focus on a controversial issue. Students examine one class of toxic substances--household cleaning agents--collecting information on household toxics, looking at their own and other people's attitudes about toxics, and working toward making responsible choices about using toxics in their homes. The unit is aimed at grades four through six and consists of nine lessons and an action project. Lessons within the unit build upon each other sequentially to provide an increasingly sophisticated understanding of toxics issues.