| Professional development of teachers is the focus of the current domestic and international educational research, with the continuous advance of the new curriculum reform, professional development of teachers referred to a higher position. The ultimate goal of education to improve the overall quality of the students, and promote the overall development of students, so the professional quality of teachers is particularly important. Teachers have the professional qualities can be summed up is:professional knowledge and affection, professional skills. The content and quality of teachers and their level of expertise not only affects the teaching, but also affect the development of students, teachers have what kind of expertise will have an enormous impact on students'future. Expertise in the disciplines of language teachers' professional knowledge, a systematic study, on the one hand, in favor of the theory of teachers' professional; the other hand, provide the basis for the development of language teachers' professional knowledge and standards.The separation of state for teachers 'professional knowledge and teachers' pedagogical content knowledge often lead to teacher development met a lot of bottleneck, which leads from the expertise perspective study to analyze the characteristics of the various disciplines grade teacher. The process of growth and expertise of the research grade teacher constitutes a way to build teachers' expertise in the development of the "road map" is of great significance. Between teachers' professional knowledge and student learning outcomes is not entirely the "identity" Which leads to the perspective of "discipline" to study the structure and characteristics of teachers' professional knowledge.The language teachers' professional knowledge, to analyze elements of teachers'professional knowledge, teachers' professional knowledge of the source may be diversified through the origin and classification of teachers' professional knowledge to further explain the features and structure of teachers' professional knowledge, the situation. In this way, for the discovery of the law of development and means of the grade teacher expertise will certainly help. The expertise of the grade teacher surveys, and analyzes the current development of the language teachers 'professional knowledge, subjective and objective analysis of the reasons, the important conclusion-the structure and characteristics of teachers' professional knowledge; The next section is further to the Analysis of the development of professional knowledge, professional knowledge of how to develop, it is necessary to break through the bottleneck of development in the investigation process may analyze, but also a comprehensive analysis to enhance teachers for teachers' professional knowledge of the structure and characteristics of the broad expertise in development programs. |