This interdisciplinary series of five environmental education units is designed for teacher use at the middle school level. The two crossover units are designed to span a period of six to eight weeks at the beginning of the eighth grade. Each unit is developed around several organizing ideas or concepts; objectives, activities and strategies, materials, and expected outcomes are identified for each idea or concept. The first unit involves a social studies to science crossover and focuses on environmental aspects of the community. The science to social studies crossover unit takes a brief scientific look at the environment of a particular community. The Language Arts Skills unit focuses on research skills, pertinent to environmental investigations and communications such as outlining, editing, writing, and indexing. The Mathematics Skills unit, designed for wide ranges of ability, includes such activities as mapping, graphing, and data collection. Outdoor Education in Camping and Other Activities includes objectives, goals and activities, and evaluation criteria for outdoor education experiences plus guidelines for teaching relationships and environmental health and disease. Appendixes are included with each unit. (TK)