Development of numerous materials projects and programs is a continuing characteristics of environmental education. Most have been modest, local in scope, and short-lived. But in recent years many have become more ambitious, substantive, and sophisticated, more effectively designed and better positioned to make significant educational impacts on selected audiences. This digest briefly describes several of these activities: "Operation Earth" (Public Broadcasting System Program); "National Issues Forum" (an environmental reader featuring 200 short scripts); "Earthwatching" (provides models for public discussion); "Essential Learnings" (joint project between Centre for Environment in India and State University of New York at Syracuse); "Activity Guide Evaluation" (comprehensive curriculum evaluation project by California State Department of Education); and "Standards Development" (American Society for Testing and Materials exploration of needs in establishing voluntary standards). A list of six selected references is provided. (CW)