Ghedabna, HaneneAzeroual, Djihed2022-10-102022-10-102022http://hdl.handle.net/123456789/13585The purpose of this research is to investigate the effect of teaching Business Idioms in building ESP students' vocabulary and its influence in boosting their communication. This work has adopted an experimental method to answer the question of whether teaching idioms helps in building students ESP vocabulary. The study was conducted at Higher School of Accounting and Finance of Constantine (E.S.C.F Constantine. The participants were 54 forth-year students that were divided into two groups (control and experimental group). Both groups were pre-tested through two activities. Then, only the experimental group received a treatment while the control did not receive any treatment. After the treatment period, the post-test was administrated to both groups. By the end of the experiment, data gained from the pre-test and the post-test were analyzed quantitatively using SPSS (Statistical Package for the Social Sciences). The results show that there is a significant improvement in the scores of the experimental group. It was noticed that teaching business idioms helped ESP students to build and strengthen their vocabulary repertoire. Therefore, teaching Business Idioms helps ESP students in enhance their vocabulary knowledge which; in turn, helps in developing business communication.enBusiness CommunicationBusiness IdiomsVocabulary BuildingOther