THE EFFECTIVENESS OF MASTERY LEARNING TECHNIQUE ON IMPROVING STUDENTS’ ABILITY IN COMPLETING ENGLISH NATIONAL EXAMINATION

This research is aimed at finding the effectiveness of mastery learning technique on improving students' ability in completing the English National Examination. This study was done at Bimbingan Belajar Gereja HKBP Sutotoyo, Jakarta. The research method used was quantitative research with "pre and post-test design", using two groups of research subjects. The population of the study 88 students consisted of Primary School (23 people)  and Senior High School Students (62 persons), and the sample of the students was the Junior High School Students which was divided into group namely experimental group (33 persons) and control group (32 persons) which were selected using clustering sampling. The instrument of the research was a set of English Final Examination. The finding of the research is that the t-value is greater than t-table (4.323> 2,000) and the significance value is smaller than the significance level of 0.05 (0.000 <0.05). Then it is concluded that mastery learning technique significantly affects the students' ability in completing the English National Examination at Bimbingan Belajar HKBP Sutoyo, Jakarta. So, it is suggested that mastery learning technique should be implemented to improve the students' ability in completing the English National Examination.