Two booklets, a guide and handbook, comprise the K-3 component of a series of guides for incorporating environmental education into the existing curriculum. The materials emphasize a multidisciplinary approach, use the concept of interdependence as an organizing theme, and offer suggestions for using the local community as a resource. The guide outlines eight objectives, including understanding of the relationship of parts of a system to the whole and using skills from many subject areas to explore the student's environment. Activities and bibliographic resources are provided for helping children learn about families and cities as systems, interdependence of people and plants, and use of tools to help people interact with the land. The handbook contains 12 lessons which are either concept-building exercises or activities in which students use the concept to explore various content areas. For each lesson, the goal, objective, materials, procedure, follow-up activities, and alternative learning activities are presented. Students examine the workings of a retractable ball-point pen, try to perform normal class activities with thumbs taped down, identify all the systems each student belongs to at any particular moment, and explore problems of overcrowded systems. (AV)