<![CDATA[Pronunciation is a fundamental aspect of English-speaking skills, as it greatly influences the understanding between the speaker and the listener. This study aims to examine the effect of using the TFlat Application on seventh-grade students’ pronunciation achievement at one junior high school in Bekasi, Indonesia. The research employed a quantitative approach with a quasi-experimental design, involving an experimental class and a control class, each consisting of 30 students. A pronunciation test was administered to both groups to measure students’ achievement before and after the treatment. The results of the analysis using Welch’s independent samples t-test revealed a significance value (sig. 2-tailed) of 0.000, with the obtained t-value of 5.8918>t-table value of 1.0757. Since the p-value of 0.000 is below the significance level of α = 0.05, the alternative hypothesis (Ha) is accepted and the null hypothesis (Ho) is rejected. These findings indicate that the use of the TFlat Application has a statistically significant effect on students’ pronunciation achievement. In other words, students who learned pronunciation with the support of TFlat showed greater improvement compared to those who did not receive the treatment. The study recommends the integration of the TFlat Application as a supporting media in English pronunciation instruction.]]>
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