<![CDATA[The objective of this research is to determine the effectiveness of the Round Robin Brainstorming technique in improving students’ vocabulary. This study was conducted at SMP Al Alawiyah Kota Serang using a quantitative approach with a quasi-experimental method. The sample consisted of students from class VII A and VII B, with 30 students in each class, totaling 60 students. Data were collected through pre-test and post-test instruments and analyzed using the Independent Samples t-Test in SPSS because the data were normally distributed and had homogeneous variance. The results showed that the Sig. (ρ-value) was 0.000, which was lower than α = 0.05, indicating that Ha was accepted. The findings revealed that the Round Robin Brainstorming technique was effective in improving students’ vocabulary achievement. The experimental class showed an increase in the mean score from 56.00 in the pre-test to 79.83 in the post-test, with the highest post-test score of 95 and the lowest score of 55. There was a significant difference in vocabulary achievement between students taught using the Round Robin Brainstorming technique and those taught without the technique. These results indicate that the technique supports students’ vocabulary development through active learning activities.]]>
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