The Effect of Applying Inquiry Method on the Students’ Achievement in Writing Expository Text

Abstract

This study deals with the effect of applying inquiry method on the students’ achievement in writing expository text. The objective of the study are to investigate the effect of applying inquiry method on the students’ achievement in writing expository text and to describe the students’ achievement after taught by using this method. Descriptive quantitative method was applied in this research by using experimental research design. This research was conducted at SMA Pembangunan Nasional, Sukamandi Hilir, Deli Serdang on February 2017. The population of this research was the grade students which consist of four classes with 154 students. By using cluster random sampling, eighty students from XI IPA 1 and XI IPA II was choosen as the sample. The inquiry method was applied on the experimental group (XI IPA I), and lecturing method was applied on the control group (XI IPA II). In obtaining the data, written test was giving to the students. The finding showed that t-observed was higher than t-table 5.12>1.66, at α = 0.0, and df = 78. It means Ha is accepted and Ho is rejected, applying inquiry method gives a significant effect on the students’ achievement in writing expository text. The effect was 81% and 19% was influenced by others factors. The students’ achievement after applying inquiry method was showing positive improvement which was proven from the increasing of the students’ total score around 1.147 and all the students were categorized able in writing expository text.