Book excerpt: This book contains six reproducible jigsaw units. Based on the principles of cooperative learning, jigsaw refers to a method of instruction in which students, working in groups, are dependent on the others in the group to gather information on a topic and to complete a task. Using jigsaw ensures that every student is an active participant in the learning process. The units are designed for high school and adult students who need to improve their reading and discussion skills. These materials are designed for multi-level classes where the reading level ranges from intermediate to advanced level. The six topics in this book are: Illegal Gill Nets, Smoking Marijuana, Using Steroids, Immigration and Employment, Smoking Cigarettes in Public, and Seeing a UFO.