%A Pratiwi Nabilla %T IMPROVING STUDENTS? ACHIEVEMENT IN PRONOUNCING DIPHTHONGS THROUGH TEXT-BASED APPROACH AT THE SECOND GRADE OF MTSN 2 BANDAR LAMPUNG %X This current research investigated i) the effect of text-based approach on students' pronunciation of diphthongs, ii) the diphthongs the students found it hard to pronounce. This research employed a quantitative research method with a onegroup pre-test and post-test design. The participants were 32 second grade students at MTsN 2 Bandar Lampung. The data were collected through pronunciation tests in the implementation of the text-based approach. The PRAAT application was used to analyze the significance of students' pronunciation improvements, focusing on pitch and intensity. The results showed that i) text-based approach significantly improved the students? achievement of pronouncing diphthongs with post-test scores significantly higher than pre-test scores, and ii) the research identified that the diphthongs /??/, /e?/, and /??/ were the most difficult for students to pronounce. The result showed that text-based approach effectively improved students' diphthong pronunciation. This suggests that text-based approach facilitates the students to improve their achievement of pronouncing diphthongs. Keywords: pronunciation, diphthongs, text-based approach, PRAAT software %C UNIVERSITAS LAMPUNG %D 2025 %I FAKULTAS KEGURUAN DAN ILMU PENDIDIKAN %L eprints86371