THE DEVELOPMENT OF LEARNING DEVICES WITH THE RME ETNOMATHEMATICS-BASED APPROACH TO IMPROVE STUDENTS’ UNDERSTANDING OF THE MATHEMATICAL CONCEPT AND MOTIVATION

This study aims to develop the characteristics of learning devices with the RME ethnomathematics-based approach to improve students' understanding of mathematical concepts and motivation. This study uses the Plomp model which consists of 3 phases, namely Preliminary Research, Prototyping, and Assessment. The subjects of the study were the grade IX students of SMP Negeri 5 Singaraja in the academic year 2019/2020. The methods used to collect data were questionnaires and tests. The instruments used were validation sheets to obtain the validity data of learning devices, implementation sheets of learning devices, teacher and student response questionnaires to obtain the practicality data of learning devices, also tests of understanding mathematical concepts and student motivation questionnaires to obtain the effectiveness data of learning devices. The results of the study were the learning devices had valid, practical and effective qualities. The student book emphasizes student-centered learning, contains problems that are close to student life, uses the RME steps to construct student understanding, starts problems with batik Nusantara culture to instill the concept of geometric transformation. Teacher guidebook helps the teacher in the learning process, includes alternative actions and answers, contains lesson plans that are appropriate to the learning process based on the RME approach.