This book describes a system for fostering effective teacher development. It is designed to assist principals and mentors in helping teachers broaden their instructional repertoire and developing a stronger professional identity. The book includes: descriptions and examples of the four basic styles of teaching; tips for matching administrator communication style with teacher style, tools for effectively observing classroom practice, and ideas for helping teachers build on their strengths while exploring different ways of teaching. Seven chapters focus on: (1) "Understanding the Clinical Cycle"; (2) "The Clinical Cycle and Psychological Functions"; (3) "Experiences of Teaching"; (4) "Language, Dialects, and the Clinical Cycle"; (5) Communicating Successfully with All Teachers"; (6) "Speaking the Languages and Dialects"; and (7) "Developing an Integrated Style. Two appendixes present the Clinical Dialect Preference Survey and Communicating with Teachers worksheets. (Contains 70 references.) (SM)