Abstract
The aim of this study is to assess whether the application of the three-step interview method affects the ability to write observation report texts among 10th-grade students at Madrasah Aliyah Swasta Al-Washliyah Binjai Serbangan. This research is an experimental study using a posttest-only design. The population consists of three 10th-grade classes, with two classes selected as samples: X IPA 1 and X Agama, chosen randomly using simple random sampling. The X Agama class was taught using the three-step interview method, while the X IPA 1 class served as the control group with conventional teaching methods. After the completion of the instruction, the post-test results showed an average score of 87.5 for the experimental class and 61.29 for the control class. The t-test results revealed a Thitung value of 79.15, exceeding the Ttabel value of 2.00, which means the null hypothesis (H0) can be rejected and the alternative hypothesis (Ha) accepted. This indicates that the three-step interview method has a significant effect on the ability to write observation report texts among 10th-grade students at Madrasah Aliyah Swasta Al-Washliyah Binjai Serbangan.
