The aim of this research is to find out whether the improvement of students adaptive reasoning ability with accelerated learning method is better than ordinary learning. This research is a quasi experiment or quasi-experimental design with pretest-posttest control group design. The sampling technique uses a class random technique. The implementation of this study was carried out on eighth grade students in one of the State Junior High Schools in Bandar Lampung. The questions given are questions of adaptive reasoning ability in relation and function material, the test of adaptive reasoning ability test is theoretically tested by the validator with the description that test questions can be understood well and empirically validity and reliability meet the characteristics to be used in research , the level of difficulty and distinguishing power of the problem can already be used to determine the improvement of adaptive reasoning abilities. Quantitative data analysis was carried out using a mean difference test and N-Gain test. The results of this study were students whose learning to apply learning with the accelerated learning method improved adaptive reasoning ability was significantly better compared to students whose learning using ordinary learning was reviewed thoroughly.
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