Agus Mulyana Ketua Penguji Imam Sudarmaji Penguji 1 Khusaini Dosen Pembimbing 1 Isnaniah Penguji 1 Siti Izza Yulia Maulida Pengarang

The aim of this research was to know whether there is significant effect of Social Networking Site Telegram on the pronunciation of students at the eleventh grade of SMA Syekh-Yusuf. This research used quantitative method. 24 students were taken non-randomly as the sample by using quasi experimental research one group pretestposttest design. Students‟ test and questionnaire were used by the researcher to collect the data. The hypothesis data was tested by using t-test formula and It was found that the result of the t-test was -Tcount < -Ttable (-4,987 < -2,068). It means, there was a significant difference after using Social Networking Site Telegram on the pronunciation of students at the eleventh grade of SMA Syekh-Yusuf. Then, it was also known from the percentages of students‟ posttest, there were 29% students can pass the minimum criteria which means the pronunciation of students was improved after using social networking site Telegram in the experimental class. Moreover, the evaluation of learning model was good with the percentages 76%, students‟ learning motivation was very good with the percentages 85%, and created a good class atmosphere with the percentages 83% in experimental class.