A step-by-step outline of recommended procedures is presented for a performance based evaluation system for teachers in Missouri. Four general performance areas form the basis for the system: (1) instructional processes; (2) classroom management; (3) interpersonal relationships; and (4) professional responsibilities. Nineteen specific, research-based criteria are the foundation of the evaluating process. A list of succinct descriptors for each of the criteria is provided. Charts and evaluation forms are included for use by observers in gathering information upon which to base both formative and summative evaluations of teachers' performance. (JD)