From the calculation of t counted was higher than t table, the result of t counted is 18.80 meanwhile t table in the degree of significance 0.05 is 1.66792. The mean of pre-test score in controlled class is 37.35 and the mean of post-test in controlled class is 47.65. The mean of pre-test score in experimental class is 41 and the mean of post-test in experimental class is 83.
The kinds of test were pre-test and post-test. The instrument of this research was written test. The sample were X science 1 and X science 2 and consist of 35 and 34 students. The population of this research were all of the tenth grade students’ in Madrasah Aliyah Negeri 1 Banggai. This research was quasi experimental research by using non-equivalent design. The objective of this research is to know whether the students’ ability in writing descriptive text using mind mapping in Madrasah Aliyah Negeri 1 Banggai can improve or not and to know how mind mapping improve the students’ ability of writing.
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