IMPROVING STUDENTS’ VOCABULARY MASTERY BY USING CLUSTERING METHOD AT TENTH GRADE STUDENTS OF SMA SW. DHARMA BHAKTI SIBORONGBORONG IN ACADEMIC YEAR 2021/2022

Abstract

The purpose of this rescarch is to improve students' vocabulary mastery by using Clustering Method. Clustering Method is a the technique that can be used to improve access to the vocabulary which means that the aim of this technique is at increasing the association that learners make with words by being encouraged to think of words of related meaning and make it in kind of bubble diagram. The subject of this rescarch was class X Of Science of SM Sw.Dharma Bhakti Siborongborong, consists of 23 students. This rescarch was conducted by using Classroom Action Research that consists of two cycles with two meeting for each one. The instruments for collecting the data were quantitave and qualitative data The quantitave data was taken from writing test (pre-test and post-test) and qualitative data was taken fromm field note.Clustering Method consisted of 20 items to fill was used as instrument to collect the data needed. The result show that the post-test result was higher than pre-test result The lowest score in pre-test was 35 and the highest score was 90 with the mean5.21. while in post-test, the lowest score was 70 and the highest score was 90 with the mean 75.21. From the result of the test. so there improvement about 21.08 between Pre-test and the Post-test The result showed that there was an improvement of the students, it was 39 %., it can be concluded that using Clustering Method can improve students' vocabulary mastery.