THE EFFECTIVENESS OF USING DUOLINGO AS LANGUAGE LEARNING APP TO IMPROVE STUDENTS’ VOCABULARY MASTERY ON THE TENTH GRADE OF SMK NEGERI 1 SAPURAN IN THE ACADEMIC YEAR OF 2022/2023

Abstract

Duolingo is a popular language learning application that can be used via internet connection. The presence of Duolingo can assist learners in expanding their vocabulary mastery by using the gamification method. The aim of this research is to find out whether it is effective or not using Duolingo in teaching vocabulary on the tenth grade of SMK Negeri 1 Sapuran in the academic year of 2022/2023. The subject of this study were 36 students of X AK 2 and 36 Students of X TO 2 at SMK Negeri 1 Sapuran. This research method is an experimental research Method, which consists of 2 classes. The instruments used in each class was vocabulary test. This research uses quantitative data. Quantitatively, data was obtained from student test scores. The finding of this research shows that the computation of the Sig. (2- tailed) was 0.00. It was lower than the significance level (0.00<0.05) It means that the hypothesis alternative was accepted. The mean of the experimental group was 75.36 and the mean of the control group was 65.16. It means that the score of the experimental group was higher than the mean of the control group. The result of this research shows that Duolingo is effective to improve students’ vocabulary mastery.