According to Teacher Education Curriculum Development Document (TECDD) of Farhangiyan University, teacher professional competencies include Content Knowledge (CK), Pedagogical Knowledge (PK), Pedagogical Content Knowledge (PCK) and General Knowledge (GK). Of these competencies, CK and PCK are specific to teachers of each major while PK and GK are common among all majors. This study was an attempt to explore the components that constitute high school EFL teachers’ CK and PCK through review of the related literature and investigation of high school EFL teachers (N=40) and teacher educators’ (N=20) perspectives. Based on the content analysis of these two sources which resulted in strong agreement, 20 items of CK and 17 items of PCK were identified. To validate the items and explore their underlying factors, data were collected from 445 high school EFL teachers and teacher educators using a questionnaire. Factor analysis with Varimax rotation was carried out on CK and PCK items separately. Regarding CK items, factor analysis gave way to the emergence of three factors, namely knowledge of the principles of language teaching methodology, knowledge of linguistics, and language proficiency. Regarding PCK items, factor analysis also gave way to three factors, namely knowledge of teaching and assessing the components of the curriculum, knowledge of developing, planning and managing language teaching, and knowledge of developing and evaluating instructional materials. The results of this study can be used in the design of high school EFL teacher education program.
