Development Of Learning Devices Based On Constructivism Approach To Improve Mathematical Communication Skills Of Grade VIII Junior High School

摘要

This research originated from the ability of mathematical communication and the activities of learners who have not developed optimally. Not developed ability of students is caused by lack of learning tools that can support the improvement of mathematical communication skills and the activities of learners. Learning tools will support the implementation of the learning process. The learning processes have not helped learners in developing their knowledge and finding their own principles/procedures of mathematics and convey the knowledge of mathematics it has. The purpose of this study was to reveal the development process and to produce lesson plan and student worksheet based on constructivism approach that is valid, practical and effective in improving the ability of mathematical communication and activity of students of grade VIII SMP. This type of research was development research using Plomp model consisting of three phases; they were initial investigation phase, prototype development phase, and assessment phase. In the development phase, the design and assessment of learning tools were done through the formative evaluation phase. The subjects of the study were grade VIII students of SMP Hang Tuah I Medan. The instruments used were lesson plan validation sheets, student worksheet validation sheets, interviews, observation sheets, teacher response questionnaires, student response questionnaires, and tests. The results of the analysis on the validation sheet of the lesson plan and student worksheet showed that the learning tools developed was valid. Learning tools were also practical based on the results of the analysis of teacher questionnaire responses, the questionnaire of learners' responses and observation sheet implementation of learning. Learning tools were also developed effectively to improve the mathematical communication skills of learners because 80% of learners got value above the KKM.