This guide, written for teachers and administrators wishing to introduce evaluation systems that promote continued teacher growth and enhance school effectiveness, suggests that meaningful change requires a clear understanding of what is already in operation, substantial skill development, and adequate resources for the duration of the change cycle. Rather than prescribing a single route to success, the guide offers examples of different evaluation experiences, describes possible evaluation courses, and, in separate chapters, offers five keys to effective evaluation: teachers, evaluators, performance data, feedback, and context. A subsequent chapter examines the important attributes of these keys in more detail. The guide concludes by offering two scenarios for success and a discussion on evaluating existing evaluation procedures, improving the teacher evaluation environment, and upgrading evaluation skills. An appendix includes a teacher evaluation experience questionnaire and a questionnaire for evaluators' self-examination. (IW)