Abstract
This research is motivated by the low ability of students of SMAN 2 Sawahlunto in writing. The use of teacher’s instructional strategy is not effective yet in improving students’ writing ability. Therefore it is necessary to apply a good and interesting strategy to increase the ability of students in writing. In this study, researcher used peer feedback strategy in writing hortatory exposition text. The aim of this study was to figure out the impact of peer feedback strategy on students' ability in writing hortatory exposition text. This research was an experimental research. The population was students of grade XI of SMAN 2 Sawahlunto in the academic year 2016/2017 which consists of five classes. The sample was taken by using cluster sampling technique consists of two classes: XI IPA 1 class as experimental group and XI IPA 3 class as control group. The total sample was 38 students. The data were collected through a writing test. The datas of this research were post-test writing from both groups of samples that analyzed using t-test formula. It was found that t-observed was 2.13, while t-table was 2.03 which means t-observed > t-table at the level of significance 0.05. Based on the results of this calculation, it can be concluded that the use of peer feedback strategy can give a better impact on students' writing ability. In other words, the results of this study showed the hypothesis that the students who were taught by using peer feedback strategy had better writing skills than students who were taught by using the conventional strategy by teachers.