The Developmental Teacher Evaluation Kit (DeTEK), a four-phase evaluation system, provides for ongoing, objective, systematic teacher evaluation in which teachers and administrators collaborate in making decisions leading to teacher improvement. Phase 1, prediagnostic survey, involves the teacher's self-analysis, using the Teacher Performance Screening Inventory: A Self-Analysis Survey. Concurrently, evaluators (principal, administrator, another teacher) observe the classroom and note observations with the Comprehensive Observation of Performance (Co-oP) instrument. A conference between the teacher and evaluator concludes this phase. Phase 2 is based upon specifically diagnosed needs or problem areas identified by both the teacher and evaluator. A Teacher Behavior Self-Report, Classroom Observer Report, Supplemental Student Report, and a Diagnostic Analysis Worksheet are incorporated into this diagnostic process. The third phase, Growth Planning and Development, is based upon specific growth activities described in the Professional Growth Plan. This phase identifies the responsibilities of each participant in the improvement effort, including provision of inservice education opportunities and resource materials. The final phase, a review session, focuses on recognizing the teacher's accomplishments resulting from the successful completion of the growth-plan activities. The review of the Teacher Summary Record provides an opportunity to make decisions regarding the initiation of a new evaluation cycle. (JD)