Development of Ethnomathematics-Based Digital Flipbooks for Hindu Community Ceremonies in Bali

This study aims to determine the characteristics of ethnomatematics-based digital flipbook. The teaching materials developed are in the form of student digital flipbook and teacher instruction digital flipbook in an effort to improve students' understanding of the concept of quadrilateral and triangles. The design of the study was development research with Plompmodel. The subjects of this study were VII grade students of SMP Negeri 1 Bangli 2020/2021 academic year. The method used to collect data in this study, namely tests and questionnaires. The instruments used in this study were to measure the validity of teaching materials using validation sheets, measuring the practicality of teaching materials using implementation sheets, teacher and student response questionnaires and to measuring the effectiveness of teaching materials used tests of understanding mathematical concepts. The results of the research are valid, practical, and effective ethnomathematics teaching materials. The learning characteristics obtained from this research are discovery learning assisted by the surrounding culture. The characteristics obtained from the digital flipbook are: (1) Emphasizes learning on the discovery of the concept of squares and triangles by activities carried out by students. (2) Contains problems that are close to student life, namely using the Hindu community ceremony facilities in Bali. (3) Contains Balinese cultural values, namely knowing the names and types of Balinese ceremonies.