The "Environment Yard" project is a 10-year effort to transform an ordinary asphalt schoolyard into a lush, naturalized environment. This book describes the project from which a natural extension of the classroom was created, reducing student boredom and antisocial behavior as they became engaged in the landscape. It instructs on how to naturalize a schoolyard into an outdoor classroom, provides innovative ways of teaching the basics in outdoor settings, and offers ideas on creating engaging play areas that foster positive behavior. Appendices provide lists of natural yard species, and helpful organizations and suppliers. (Contains 118 references.) (GR)