Desain Pembelajaran Materi Belah Ketupat Menggunakan Kain Jumputan Palembang untuk Siswa Kelas VII

The design learning rhombus using kain Jumputan Palembang for VII grade students. This research aims to investigate how to use Kain Jumputan Palembang to build student’s understanding on rhombus. Students were required to comparing the area of two cloths, designing and making rhombus then reshaping to new shapes, determining the area of rhombus, comparing the perimeter of two cloths and determining the perimeter of rhombus. Subjects were 30 first grade students of SMP Pusri Palembang. The study used a design research method consisting of three stages : preparing for the experiment, experiment in the classroom (pilot experiment and teaching experiment), and retrospective analysis. During the preparing for the experiment stage, instructional activities was designing utilizing of Indonesian Realistic Mathematics Education (PMRI) approach. The result of experiments showed that Kain Jumputan Palembang could be used as a starting point by first grade junior high school to learn rhombus.