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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.