Abstrak
ZAHRA HUMAIRA, 2318004. “The Effect of Using Inquiry Learning On Students’ Writing Skill of Hortatory Exposition Text At The Eleventh Grade Of MAN Kota Pariaman”. A thesis, English Education Study Program, UIN Sjech M. Djamil Djambek Bukittinggi, 2023. This research was done due to several problems found in eleventh grade students at MAN Kota Pariaman related to students' writing skills. The problems of this research were, some students have difficulty in developing their ideas in writing, and the teacher used the conventional way to teach writing, some students have less motivation in writing. Inquiry learning is related to this because the inquiry model enables to help students in the writing process, students can learn how to generate ideas and make good organization by answering questions and solving problems based on facts and observations. This research aims to find out whether there is a significant effect of using inquiry learning on students' writing skills. This research used experimental research. The researcher chose a quasi experimental research with two group pretest and posttest design. The population of this research was the eleventh grade students in MAN Kota Pariaman consist of six classes. The sample was XI IPA 1 which was treated as experimental class and taught by using Inquiry learning model and XI IPS 1 was treated as control class and taught by using conventional model. To determine the sample, the researcher used purposive sampling technique. The data was analyzed by using liliefors test to test the normality and homogeneity data. Then to test the hypothesis, the researcher used t-test and (a) = 0.05. From the result and accounting of pre test and post test scores of the experiment class, it was found that had poor score in pretest which mean score 47.74 for experiment class and 46,29 for control class. After treatment, students writing skill increased significantly which mean score 81,61 for experiment class and 71,48 for control class. The researcher used the t-test formula by comparing the post test of experimental and control classes through SPSS 22. The result of t-obtained from hypothesis one = 10,172 > t-table 2,042 with degree freedom (df) = 30 with 0,05/2=0,025. Meanwhile, the sig (2-tailed) was 0.000 0.005. The result of t-obtained from hypothesis two = 3,021 > t-table 1,670 with degree freedom (df) = 60 with 0,05. Meanwhile, the sig (2-tailed) was 0,001 0.005. So it can be concluded that alternative hypothesis (Ha) was accepted. From the result of the data, using inquiry learning can help to improve students’ writing skill.