The Development of Learning Design for Polyhedron Based on Realistic Mathematic Education for Grade VII of Junior High School Students

Abstract

The flow of teaching mathematics on the topic of Polyhedron all this time emphasizes memorization of formulas and the provision of exercises to students which are still teacher-centered. Learning design is needed to facilitate students to actively participate in building the concept of building a flat-sided class room in grade VIII of Junior High School based on Realistic Mathematic Education using the learning flow in the form of Hypothetical Learning Trajectory and implementation products in the form of teacher books and student books. This type of research was development research that combines two types of research design, namely the Plomp and Gravemeijer and Cobb models which consist of three phases: preliminary research, development or prototyping and assessment phases. This research was limited to preliminary research. Teacher interview guidelines, student interview guidelines, field notes, preliminary test questions for students' mathematical reasoning abilities are used as instruments. From this preliminary research phase, it could be concluded as follows: (1) teachers are guided by printed books owned by teachers and students, which have not facilitated students to develop concepts through meaningful learning activities, (2) teachers also had not designed learning paths which was appropriate for teaching a mathematical topic, (3) the mathematical reasoning ability of students was not optimal, (4) the preparation of the learning flow was in accordance with the results of curriculum analysis.