This study aims to test the effectiveness of using MALL through Duolingo on the speaking skills of seventh-grade students at SMP Negeri 5 Sukawati. This study used a quasi-experimental research design. Participants were 75 seventh-grade students at SMP Negeri 5 Sukawati, divided into two classes. A speaking test was used to collect data through a pretest and posttest. Data were analyzed using inferential statistics and non-parametric tests, especialy the Mann-Whitney U test and Guade's ANCOVA. The test results showed a significant difference in post-test scores between the two groups after controlling for pre-test scores as a covariate using the Guade's ANCOVA test, with a p-value of 0.000, or lower than 0.05. These results indicate a significant difference between the experimental and control groups. The mean score for the experimental group was 71.08, while the mean score for the control group was 64.56. Therefore, it can be concluded that using Duolingo has a significant effect on students' speaking skills.
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