THE EFFECTIVENESS OF KAHOOT APPLICATION FOR FORMATIVE ASSESSMENT IN ENHANCING STUDENTS’ VOCABULARY COMPETENCE

The aim of this research was to find out the influence of using Kahoot application toward students’ vocabulary competences of eight grade Islamic Junior High School in Indonesia student in the Academic Year 2025/2026. The research was conducted quantitatively by quasi-experimental design. The sample in this research was 60 students. This research was carried out in two classes, namely
controlled class and the experimental class. The data were gathered through tests which consisted of the pre-test and the post-test as the primary instrument and
Field note as the secondary instrument. The researcher took VIII-A as the controlled class and VIII-B as the experimental class, each class consisted of 30
students. The collected data were analyzed through descriptive statistics to present the students’ vocabulary scores, and inferential statistics to analyzed the data
including normality test, homogeneity test, and t-test to verify the hypothesis by using IBM SPSS v.30. The results showed that the statistical calculation at a
significance level of p-value (0.025) was lower than sig α = 0.05 (5%). This showed there was a statistically significant difference between the two group. The calculation of effect size using Cohen’s d revealed a value of 0.59, which falls
within the range of a moderate effect. This study implies that game-based learning applications like Kahoot are not just supplementary tools but can play a substantial role in improving language learning outcomes when used thoughtfully
in the classroom.