Investigating of Students‟ Pronunciation Errors‟ in Reading Aloud At SMA Negeri 2 Timang Gajah

The purpose of this study was to investigate pronunciation errors in diphthong and triphthong sounds during reading aloud among eleventh-grade students at SMA Negeri 2 Timang Gajah, 20 students were selected as participants. The research employed a descriptive quantitative. And to get the data were collected through pronunciation test, diagnostic test were chosen be an instrument in this research. The test was analyzed by recording and using formula of the percentage. After analyzed the data, the researcher found that the dominant students‟ error in diphthong during reading aloud in word “Roland” (62%). Compared to triphthongs, the findings indicate a higher frequency of error in word “Mower” (38%). Therefore, it can be concluded that there are two higher pronunciation errors of diphthong and triphthong made by the students. As the results, the study recommends targeted pronunciation training programs, interactive exercises, technology integration, and creating real life context for pronunciation practice. Continuous professional development for teachers is also suggested to enhance comprehensive language proficiency and communication skills among students.