Improving the Students’ on Vocabulary Mastery through Puzzle Game at tenth grade of Madrasah Aliyah Swasta Plus Al – Kalam Sagu YUSTIKARINI BULU DONI INTRODUCTION Vocabulary skill is one of linguistic features, which influences the communicative competence. Paulston et al (1976: 55) state that the one thing that interferes most with our students’ communicative competence is pitiable vocabulary and we have recently come to accept the fact that our student have been right all these years when they complained about not knowing and not being taught sufficient words. Problems of Study The problems are formulated as follows: What is the main problem faced by tenth grade students of Madrasah Aliyah Swasta Plus Al – Kalam Sagu in mastering English vocabulary? How vocabulary mastery is improved by the implementation of puzzle games in tenth grade students of Madrasah Aliyah Swasta Plus Al – Kalam Sagu? The Objective of the Study The Objective of the study as follows: To know the main problem faced by tenth grade students of Madrasah Aliyah Swasta Plus Al – Kalam Sagu in mastering English vocabulary. To know how is vocabulary mastery improved by the implementation of puzzle games in tenth grade students of Madrasah Aliyah Swasta Plus Al – Kalam Sagu. RESEARCH METHODE The design of this study was Classroom Action Research (CAR) which was conducted in collaboration between the researcher and the classroom teacher. The collaborator is one of the English teachers who taught in Madrasah Aliyah Swasta Plus Al – Kalam Sagu. In this case, the subject of the study is the tenth grade students Madrasah Aliyah Swasta Plus AlKalam Sagu. There are 30 students consisting 15 male and 15 female RESEARCH FINDING By using Puzzle games as the media in learning process of vocabulary there is an indicator that students were more motivated to learn English. At the beginning, only 8 from 30 students that active and have good vocabulary. After that, in the second meeting in first cycle, only 15 students from 30 (50%) students which active and have good vocabulary mastery using puzzle games and in the last meeting in cycle two the result increased 25 from 30 students (83%) which have good vocabulary. This case describes that there were very significant improvement in success study from the pretest, cycle 1 and cycle 2 with percentage 26,7% and the average score 69 on the pretest, 50% and average score is 70,1 in cycle 1 and 83% in cycle 2 and the average score is 76,6. The improving students’ vocabulary mastery caused by the implementation of puzzle game in teaching learning process. CONCLUSION Success study consist two criteria that is success individually and classical success. After the implementation of learning media in teaching vocabulary in cycle 1, the result of mastering vocabulary of students individually still low. There are 15 students got success and 15 students not success yet from total 30 students. In the cycle 2 show that the result of students vocabulary mastery had the significant improving. After the implementation of learning media in teaching vocabulary in cycle 2, the result of mastering vocabulary of students individually improved. Which there 25 students got success and 5 students not success yet from total 30 students.This case show that the result of cycle 2 was reach the standart that determined by the researcher 75% the result of cycle 2 83% and the students average score 76,6. SUGGESTIONS For Parents The parents should cooperative with the school need in completing the facilitieswhich support learning process. The parents should be cooperate with school to support the quality of students by assist them when they study vocabulary in the house. For Teacher Teacher should be creative in selecting the techniques with the purpose to make students easier in accept the material and make them interesting with the lesson given The teacher has to improve students’ vocabulary mastery with many technique because it skill need improvement. For Students Students are able to use the invention of modern technology to access which is related to the learning material at school. Students should be more active, be more participate and be model to their other friends. THANK YOU