A field guide to your schoolyard is a species account, a catalog of the animals and/or plants found in your schoolyard. Which plants and animals, how much information your guide contains about each, and who contributes to the guide are up to you. Your field guide can be a small book about the birds in your schoolyard, created by a single class. Alternatively, it can be a comprehensive study and complete inventory to which the entire student body contributes over the course of the school year—or a living document that expands every year. Big or small, your field guide is what you need and want it to be to help you engage your students in an exciting and challenging environmental education experience.