The aim of this study is to identify the effectiveness using SWELL to teach
descriptive text writing at the tenth-grade of MA Nahdlatul Ulama Mranggen in the
academic year of 2019/2020. The method of this study is a quantitative research
and an experimental design. The sample of this study is the tenth grade of MA
Nahdlatul Ulama Mranggen. Students of X MIA 1 as the experimental class,
whereas students of X MIA 2 as the control class. Each class consists of 30
students. The sample technique of this sampling is purposive sampling. The
instrument used written pre-test and post-test. The data is served by numerical and
tested by the statistical formula of the t-test. Based on the calculation of the data,
the mean score of the experimental class is increased. The finding of this study
showed that the use of SWELL in descriptive text writing is effective. It is proved
by the data that (6.71) is higher than (2.00) in the significance level of 0.05. It is
considered that H0 is rejected and Ha is accepted. It is stated that there is a
significant effect on using SWELL to teach descriptive text writing.