The Effect of Learning Application Duolingo to the Fifth Grade Students’ Vocabulary at MI Mambaul Ulum 2024/2025

Moh. Rijal, Yulianto (2025) The Effect of Learning Application Duolingo to the Fifth Grade Students’ Vocabulary at MI Mambaul Ulum 2024/2025. Undergraduate thesis, University of Nusantara PGRI Kediri.

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Abstract

Students in Indonesian elementary schools, particularly at MI Mambaul Ulum Dahu, face significant challenges in mastering English vocabulary due to rigid textbooks and limited teacher creativity. Nation (2001) and Schmitt (2020) assert that regular exposure, contextual application, and interesting teaching are necessary for successful vocabulary acquisition. By incorporating the gamified and interactive language learning program Duolingo into vocabulary training for young students, this study tackles these problems. This research used a quantitative one-group pretest-posttest design. involving 24 fifth-grade students. Pre-tests, Duolingo treatment sessions cantered on the "Food and Drink" topic, and post-tests to gauge progress were all part of the study. To ascertain the impact of Duolingo on vocabulary mastery, data were examined using SPSS's paired sample t-test. The post-test mean increased from 55.88 to 75.96, indicating a statistically significant increase in students' vocabulary scores following their use of Duolingo. A t-count of 9.961 and a p-value of 0.000 were found in the statistical analysis, suggesting that the treatment had a significant positive impact. These results demonstrate that by improving student engagement and aiding retention through digital media, Duolingo improves vocabulary learning. Based on these findings, the researcher advises integrating Duolingo into English language instruction in primary schools and concludes that it is a useful tool for promoting vocabulary development in young learners.

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