A general approach to environmental education evaluation and practical knowledge about the area of educational evaluation are offered in this teacher's guide. An introductory section explains both the use of the guide and use of a four step evaluation process. Practical aspects of evaluation are highlighted in six chapters through specific questions related to a scientific evaluation process for environmental education. These include: (1) what should I evaluate? (offering perspectives on what aspects of student learning and programming should be evaluated); (2) how can I plan my evaluation? (focusing on the selection, development, and/or use of evaluation instruments); (3) how can I conduct my evaluation? (discussing data collection, analysis, and interpretation techniques); (4) how can I use the results of my evaluation? (suggesting ways of using assessment results); (5) how can I put it all together? (providing a case study of an evaluation); and (6) where can I get additional help? (identifying sources of information). Appendices contain evaluation designs and the instruction for use of the chi square test. (ML)