Abstract The main purpose of this study is to present and evaluate a model to execute successful On the Job Training Course for Iranian EFL teachers. In order to achieve the goal of the study, 441 teachers of different language institutes in several cities of Iran were asked to complete a self-made questionnaire which was designed based on some face-to-face interviews and observation documents of 26 teachers. As factor analysis was the most crucial concern of this study, the 43 items of the questionnaire were piloted on a sample of 147 EFL teachers. Regarding this matter, the scale in this study enjoyed having a sufficient communality value greater than 0.5 for 25 questions in the questionnaire out of 43 questions. Pearson’s correlation coefficient and structural equation modeling (SEM) were run to analyze the relationships among the components. The result revealed that the research model was in the domain of acceptance. The findings of this study can provide fruitful information for English teaching and learning stakeholders, educational policy makers, supervisors, and those involved in second language teacher education as well as English language teachers in EFL contexts. Manuscript profile