- - - MA in TEFL, English Department, Islamic Azad University, Qom Branch, Qom, Iran

This study was an attempt to consider the effect of using Telegram application for EFL (English as a Foreign Language) learners' writing accuracy and learning grammar points. Twenty intermediate EFL learners were selected from the vacant language learners in a language institute to participate in this study. The students who achieved the required score on a language proficiency test (the Oxford Placement Test, OPT) were selected as the participants. Pre-test were given before the treatment sessions to control the participants' grammar knowledge and writing accuracy at the beginning of the research. During a term which has sixteen-session course, the teacher presented the instruction on grammar and accuracy in writing to the participants by instant messaging, using above application. At the end of semester, they were given the post-test. Achieved data were analyzed through Paired Samples t-tests to compare the means of the pre-test and the post-test of the learners. It has discovered that writing accuracy of the participant had improved by receiving instruction of grammar points through social network (Telegram App). There was a significant difference in the means of the participants on the pretest and posttest. They performed more effectively on the posttest, which can be attributed to instruction through social networking. The results of the study can be beneficial for language teachers, materials developers and students

CALL, grammar, Social Networking, Telegram app, Writing accuracy