As part of an updated series of activity oriented educational materials dealing with aspects of the Guam environment, this publication focuses on the common plants and animals found in schoolyards on Guam. Like a field guide, this publication contains descriptions, ecological information, and some historical notes about the common trees, shrubs, herbs, lichens, vertebrates, and invertebrates of Guam. Although materials are designed for Guam, they can be adapted to other localities. This publication introduces students to the basic techniques for studying schoolyard flora and fauna and can be applied to backyards, parks or any other area. (MR)