The development of learning implementation based on context-based learning approach in surface area and volume topic to enhance mathematical representations for grade-9 students
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Abstract
The purposes of this research were to study: 1) the appropriate learning implementation based on Context-Based Learning (CBL) approach that enhance mathematical representations, and 2) the effect of learning implementation based on CBL on mathematical representations in surface area and volume topic for grade-9 students. This research was conducted in the first semester of the academic year 2019. The research sample was 23 grade-9 students from a medium sized school in Tak Province. The research applied classroom action research and took 17 hours for learning implementation. The research instruments included five lesson plans, worksheets, and mathematical representations. The data were analyzed by content analysis and the data acquired will be checked for trustworthiness by resource triangulation technique; and data were analyzed by analytic scoring. The findings of the study indicated that the learning implementation based on CBL approach to enhance mathematical representations should emphasize on the mathematics problem solving situations that should be more concerned in context of Karen students’ real life, checking students’ new knowledge before giving them the inexperienced situations. Moreover, the teacher should encourage students to draw 3D shapes into a geometric model, to do hands on activities, to use mathematical representations in problem solving. When they presented in front of the class, teacher should give them a chance to exchange ideas with friends and sometimes let them presented in Karen in order to increase their understanding, and ask them to give example of situations that related to real life. In addition, most students can express their mathematical representations in a good level. They can determine the related variable in given situation and write in form of mathematical model that apply to solve the problem. Furthermore, the students can use the appropriate formula and proceed to solve the problem well.
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