Learning cylinder through the context of Giant Lopis tradition

Abstract

Geometry comprehension is a significant aspect and basis for studying mathematics. However, geometry is nonetheless a challenging material for students, particularly a cylinder. Therefore, this study aims to establish a learning trajectory using the Giant Lopis tradition as a context to help students understand the idea of a cylinder. The approach used in this study was Realistic Mathematics Education, named PMRI in the Indonesian version. The subject of the study is the ninth grade students of SMP 38 Semarang, with the involvement of 6 students who are selected in diverse abilities. The methodology applied was Design Research that consists of three stages, namely: preliminary design, experiment design, and retrospective analysis. However, this study reveals only the findings of the design experiment, which is a pilot experiment in particular. The data was compiled using various methods, e.g., observation, video recordings activities in class and group study, collecting student data, and interviewing students. The learning activities of students involve four activities: identifying the elements of the cylinders through an interactive video of Giant Lopis tradition, finding the surface area of the cylinder, finding the volume of the cylinder, comparing surface area or volume for different size of cylinder, and solving contextual problems of a cylinder.