Improving Students’ Vocabulary Mastery Through Engvid Application

This thesis is entitled Improving Students’ Vocabulary Mastery Through EngVid Application, aiming at finding out the extent to which the EngVid application improves students’ vocabulary mastery and identifying the obstacles faced by students in improving their vocabulary through the use of the EngVid application. The research employed a quantitative approach with a pre-experimental design, specifically the one-group pre–test–post–test design. The population of this study consists of all students of Grade XI at SMK Negeri 2 Banda Aceh in the academic year 2025/2026. The sample was selected according to criteria set by the researcher. In this case, the sample comprised 31 male students. Data were collected through vocabulary tests (pre- and post-test) and a questionnaire. The results of the study showed that using the EngVid application significantly improved students’ vocabulary mastery. This was indicated by an increase in the mean score, from 72.25 in the pre-test to 85.03 in the post-test, a difference of 12.78 points. The post-test results also showed an increase in the proportion of students achieving the 'good' and 'excellent' grades. Furthermore, the questionnaire results revealed that students primarily struggled with understanding native-speaker pronunciation and speed of speech, as well as unfamiliar vocabulary used in the videos. However, teacher guidance and additional explanations helped students to better understand the vocabulary presented. In conclusion, the EngVid app is an effective digital learning tool for helping students to master vocabulary. However, teacher support is still important in helping students overcome comprehension difficulties, particularly when learning from videos of native speakers.