Improving the Vocabulary Ability of Junior High School Students Through the Lingodeer Application

This research aims to study the effectiveness of the Lingodeer application in improving the ability of English vocabulary at one of the junior high schools in Sidoarjo, through a quantitative approach. Data collection is done by carrying out a pre-test before application use and a post-test after application use. The results of the analysis showed a significant difference between pre-test and post-test scores. The average pre-test score is below the school's minimum grade standard, which is 60, while the average post-test score increases to 86.10, exceeding the school minimum grade standard. The sig. 0,000 < 0,005, which indicates that the H₀ is rejected and the Ha is accepted. These findings indicate that the Lingodeer application is significantly effective in improving the vocabulary of junior high school students, and this discovery suggests that the potential of technology in education can support a more interactive and effective language learning process.