This book provides an easy and entertaining way for teachers to incorporate origami into a variety of math classes. It contains detailed plans for 29 hands-on origami activities, complete with handouts, solutions, and instructor’s guides. Reflecting feedback given to the author from teachers who have used the book, this second edition includes seven new activities and revises previous activities. The activities—all scalable—are written for high school or university math classes, but many of them contain pieces that can be easily used in middle school.