This study aimed to analyze the differences of the reading ability in text report in English between students who were taught using the cooperative learning of jigsaw and K-W-L method. This type of study was an experimental research with a pretest and posttest control group design. The population of this study was all students of class IX SMP Negeri 2 Balongpanggang Kabupaten Gresik with a total were 128 students. The sampling technique in this study was a simple random samling technique. The instrument for collecting data was a test which was used to measure the students’ reading ability in text reports. The data was analyzed by t-test. The results of t-test at 5% significance level indicated that the reading ability (posttest) between experiment group 1 and experiment group 2 has a t-count value of 2,140 (df = 50) greater than t-table (2,008) and probability value was 0,037 less than 0,05. Thus, there was a differences of readning ability in text report in English between student who was taught using the cooperative learning of jigsaw and K-W-L method where students were taught using K-W-L method have better scores than students were taught using jigsaw method. In addition, the results of the paired-samples t-test at the 5% significance level indicated that the probability value between the pretest and posttest of the reading ability was 0,000 < 0,05, so this means that there was an increase in the reading ability of text reports by 33,55% before and after the treatment of learning methods.
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