In an effort to update teacher evaluation systems to reflect changing attitudes toward the teaching profession and to focus on staff development, state departments of education and school districts have designed mentor and master teacher programs, career ladders, shared leadership programs, and differentiated evaluation programs. They have also adopted commercial programs such as Madeline Hunter's Program for Effective Teaching (PET). These progressive programs all link their evaluation systems to research on effective practices, provide training for evaluators, hold administrators accountable for implementing effective evaluations, focus staff development programs on evaluation-identified deficiencies, and make teachers active partners in the evalaution process. This report discusses the contributions of three progarms--Tennessee's Career Ladder Program, the Florida Performance Measurement System, and the Hunter PET model--to improving evaluation of teacher performance. Implications and conclusions are discussed. Participative supervision for teachers is essential for improved classroom instruction. More changes are needed to increase teaching professionalism and move educators from isolated positions to more collegial associations. (12 references) (MLH)