The Influence of Pen Pal Electronic Mail Exchange on Students' Writing of Descriptive Text (A Quasi-Experimental Research at the Tenth Grade Students of MA PINK 03 in Academic Year of 2019/2020)

This research was carried out to obtain empirical evidence on the influence of pen pal electronic mail exchange on students? writing of descriptive text at tenth grade of MA PINK 03 in academic year of 2019/2020. The type of this research is a quantitative research and used quasi-experiment as its design. The population of this research is all the tenth grade students of MA PINK 03 in academic year of 2019/20120. The sampling technique applied purposive sampling and consisted of 71 students. The samples were assigned into two groups, they were class X KH. Abdul Wahab Hasbullah (WH) as the experimental class and class X KH. Hasyim Asy?ari (HA) as the controlled class. The instrument to obtain the data was written test and it was administered twice in the pretest and posttest which also performed as the technique of data collection. Then, the result of this research was obtained from calculating the data using t-test with the significance level (&#945;) = 0.05 and the Cohen?s d effect size. The result showed that the mean score of posttest in the experimental class was higher than in the controlled class (83.86>76.17). Therefore, the statistic hypothesis test showed that &#961;-value of posttest and the gained score was 0.000 < sig. &#945; = 0.05. Furthermore, the effect size was 1.17, or regarded as strong effect. It proved that the alternatives hypothesis (Ha) was accepted and the null hypothesis (H0) was rejected. In conclusion, pen pal electronic mail exchange was effective with strong effect on students? writing of descriptive text at tenth grade of MA PINK 03