Efektifitas penerapan LKS dengan pendekatan open ended untuk pembelajaran penguasaan konsep matematika

Abstract

<p align="justify">This research is motivated by reasons of low mathematical reasoning and ability to solve mathematical problems. Learning is still centered on the teacher who only provides mathematical formulas without providing the concept of discovery and problem solving. The use of a learning approach that is not optimal. Mathematics is a subject that is difficult to solve the problem. Most teachers in elementary schools use student worksheets (LKS) in the learning process. The problem used in the student worksheet (LKS) is a closed problem. The unavailability of student worksheets developed based on an open-ended approach that emphasizes mastery of concepts and reasoning to solve problems. The research method is quantitative research in the form of experimental research with a Non Equivalent Control Group Design. Data collection techniques with tests. The research subjects were students at SDN 1 and SDN 2 Kebloran Rembang. Sampling technique with purposive sampling. Data analysis using the Paired Sample Test. Test the effectiveness of getting the value of Sig. (2-tailed) of 0.000 <0.05. The decision was that Ho was rejected and Ha was accepted because Sig. (2-tailed) < 0.05 and t count > t table. The conclusion of this study is that there is a difference between the group and the experimental group, which shows a significant increase in students' mastery of mathematical concepts from the Development of Student Worksheets with the Open Ended approach.</p>