Teaching Material Based on Metacognitive Strategies to Improve Student's Critical Thinking Ability

This research was a development research that aimed to produce teaching material based on metacognitive strategies which valid, practical, and effective to improve students' critical thinking skills. The subjects of this research were Year 8 students at one of Junior High School in Bandar Lampung Academic Year 2017/2018 with purposive sampling techniques. Teaching material based on metacognitive strategies developed by using Research and Development method which referred to the development model. Data analysis techniques to get data of critical thinking skills in this study was quantitative data based on the results of critical thinking ability tests using Mann Whitney U test to determine differences in average learning outcomes and normalized N-gain to determine the effectiveness of metacognitive-based teaching material before and after learning. The results of the preliminary study indicated the need for the development of teaching material based on metacognitive strategies. The results of the validation of teaching material indicated that teaching materials was in the valid or feasible category. The results of the trial materials showed that the teaching material was included in the practical category. The effectiveness test results show that learning using teaching material based on metacognitive strategies is more effective to improve students' critical thinking skills compared to learning without using teaching material based on metacognitive strategies.