Effects of teaching vocabulary mastery by contextual teaching and learning

This study aimed to measure the effect of using contextual teaching and learning on vocabulary mastery. This study was conducted at SMA Muhammadiyah 1 Palangkan Raya academic year 2016-2017 as the subject of the study. The subject of this study consisted of 105 students’ of tenth grade. It was used quantitative approach in finding out the answer of the problem of the study, technique of the data collection used test. The design of the study was pre-experimental design where the writer used one-group pre-test/post-test design with a kind of treatment. The sample of study was determined using cluster sampling technique. There was one class, namely X-3 with the total number of 21 students. The writer gave pre-test and posttest to the group. The result of data analysis showed that there was effect of using contextual teaching and learning the students’ vocabulary mastery at tenth grade students of SMA Muhammadiyah 1 Palangka Raya. It meant Ha was accepted and H0 was rejected. It can be seen from the data calculated using ttest formula. The tobserved was consulted with ttable which df = 50. Significant standard 5% = 2,10. Manual calculation found that the tobserved was higher than the value of ttable at 5% significance level or 5,088 > 2,10