Teachers may be evaluated (1) according to their skills and attitudes, (2) by observing their behavior, (3) observing the students' behavior and achievement, and (4) by a combination of means. Some systems, summative and formative, now enjoying rather wide popularity are described in this document. IOTA (Instrument for Observation of Teaching Activities) places the responsibility for evaluation in the hands of the teacher; it is strictly a formative system geared for the improvement of instruction. The Naperville Teacher Performance Evaluation System has provided a model for schools wishing to conduct their own procedure. This system is a formative evaluation process to improve instruction. School Management Institute Materials (The Redfern Approach) may be helpful if a school is interested in conducting its own inservice teacher evaluation workshop and developing its own evaluation system. Three self-appraisal systems considered are the Guided Self Analysis (GSA), Teacher Self Appraisal (TSA), and Flander's Interaction Analysis. The GSA and TSA make use of videotaping the classroom and the Flander's system utilizes an observer in the classroom. Two observation systems generally intended for formative evaluation only are the IGE (Individually Guided Education) observation cycle and PLAN (Plan for Learning in Accordance with Needs) teacher observation scale. The schemes presented may provide a starting point for school districts interested in developing their own system. (RC)