The Developmental Teacher Evaluation Kit (DeTek) and the Texas Teacher Appraisal System (TTAS) are compared in this report. The DeTek model is based on objective analysis, diagnostic procedures to guide inservice planning and professional growth, an ongoing cycle of evaluation and development, and provision of diagnostic instruments. It is limited by the lack of a summative component; a brief, isolated observation time; limited use; and the large investment of time and personnel required. The TTAS, used to determine career ladder placement and contract renewal, is fixed and summative. The DeTek model is based on formative and flexible evaluation, a collaborative effort, and professional growth through humanistic rather than punitive means. The recommendation is made for using a combination of DeTek and TTAS for formative and summative evaluation. One figure is included. Appendices present the DeTek criteria list, the DeTek 10-step process, and a figure of the 10-step sequence. (8 references) (LMI)