Abstract
This study aims to analyze the effectiveness of learning materials oriented on problem-based learning models, the improvement mathematical problem solving ability and students’ metacognition ability. Learning materials that developed are lesson plan, student book, student worksheet, mathematical problem solving ability and students’ metacognition ability test. This research is a development research by using the development model of Thiagarajan, Semmel and Semmel (1974). Valid learning materials according to experts, tested in class VII of SMP Negeri 13 Medan (seventh year junior high school). The results showed that learning materials oriented on problem-based learning met the effective criteria and improved mathematical problem solving and metacognition ability. Level students’ metacognition when problem solving met level of strategic use, aware use, and tacit use.
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