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There is nowadays a burgeoning research base, mostly in mainstream education, acknowledging that teachers have the most important impact on students' achievement outcomes. This line of research, however, has not yet found its way into second language pedagogy and little, if any, empirical evidence exists on which set of EFL teacher characteristics promotes positive student learning outcomes. In line with this argument, the present study investigated three important teacher-related variables, i.e. teaching styles, teachers’ sense of efficacy, and teacher reflectivity to see how they relate to student achievement gains in ELT. 30 EFL teachers teaching in Ilam (Iran) high schools participated in this study. The final exam score of the participants' students served as the dependent variable of the study. The results of multiple regression analysis (R=.91) showed that the three variables investigated can significantly predict student achievement outcomes. Besides the R value, the results showed individual correlations between each pair of the variables which reveal interesting relationships. 

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Learning styles are assumed to be consistent with personality characteristics of individuals (Brown, 2003 Kolb, 1984). Teachers’ teaching efficacy (Bandura, 1997, 1977, 1995 Wheatley, 2001) has also been found to be important in educational reform. However, the impacts of gender and personality on language teachers' teaching efficacy and teaching activities preferences have not been adequately explored. This study was an attempt to investigate the impacts of personality and gender on Iranian English teachers' teaching activities preferences and their teaching efficacy. To accomplish this, 280 male and female English language teachers participated in the study. Myers -Briggs Type Indicator (MBTI), teaching efficacy, and teaching activities preference questionnaires were used. To analyze the data, descriptive statistics and Two ANOVA tests were used .The results of the study showed that ESTJ (extroverted, sensing, thinking, and judging) and ISTJ (introverted, sensing, thinking, and judging) were predominant personality types among Iranian EFL teachers. Results also indicated that both male and female teachers with different personality types have the same sense of teaching efficacy. It was also revealed that gender and personality influence teachers' teaching activities preferences.

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Nowadays, teachers are receiving more attention in the studies done in mainstream education since it is believed that they play the most important role in educational settings, and therefore their different aspects, such as teacher efficacy, burnout, teaching style, and emotional intelligence, have received great attention. Moreover, demographic characteristics of teachers are more examined these days since they are thought to play major roles in teachers’ performance in the classroom. Despite great attention to different aspects of teachers and their demographics in mainstream education, such studies are rare in the English Language Teaching field. This study was therefore designed to explore possible relationships among English language teachers’ sense of efficacy, burnout, teaching style, and emotional intelligence on the one hand, and to document probable differences among them with respect to teachers’ gender, degree, and experience on the other hand. To this end, four different instruments, one for each of the variables, were administered among 264 Iranian English language teachers. The findings showed significant even though not high correlations among some of the components of teacher efficacy, burnout, teaching style, and emotional intelligence, as well as significant differences among some the components of these variables with respect to teachers’ gender, degree, and experience. The results of this study can help teacher educators in dealing with different teachers since they will know about the variations among teachers’ performances in the classroom and the problems any teacher with certain characteristics may have.