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  • This research is conducted based on the main problems How to teach Degree of Comparison before using VOA learning english YouTube channel and How to teach Degree of Comparison after using VOA learning english YouTube channel?. Based on the main problems formulated above the purpose of research as state as folows: to know students the aim study is to find out the effect before after of using Voice of America (VOA) learning english YouTube Channel in teaching degree or comparison at the eighth grade junir high school of SMPN 24 Kota Serang. This research investigates the effectiveness of using voice of america (VOA) learning english YouTube channel to improve students understanding on degree of comparison. The subjects of this study involved 60 students as a sample from class VIII of SMPN 24 Kota Serang in 2021 as a population. The method used in this study is a quantitative method. The design of this study was a quasiexperimental design with two classes, namely the experimental class and the control class with pre-test and post-test techniques. The calculation results show that the value of t0 is 3.26 with degrees of freedom (df) is 58. In this study, the degree of significance at the 5% and 1% levels in the significance table shows that the 5% level of df 58 is 1.68 and the level of 1% of df 58 is 3.26. Based on the test criteria, the results showed that there was a significant difference between Students' Understanding on degree of comparison using Voice of America (VOA) learning english YouTube Channel. That is, the Voice of America (VOA) learning english YouTube Channel it is effective and applied in class VIII SMPN 24 Kota Serang on Students Understanding on degree of comparison.