Innovation in Geometry Problem-Solving Through Ethnomathematics-Based Digital Teaching Materials for Junior High Students

Abstract

This research develops an ethnomathematics-based e-module that integrates Bima local wisdom into geometry teaching for eighth-grade students at SMP Negeri 1 Kota Bima. Using the 4D development model (Defining, Designing, Developing, Disseminating), the e-module connects mathematical concepts with local culture, such as tembe nggoli motifs, sarau, wonca, and doku household tools, uma lengge house structures, and mpa’a gopa traditional games. The study shows that the developed e-module is valid, practical, and effective in enhancing students' geometry problem-solving abilities. Data from the trials demonstrate a significant improvement in geometry problem-solving skills in the experimental group compared to the control group. The novelty of this research lies in the deep integration of Bima local cultural elements into geometry teaching materials, which has not been extensively explored in previous studies. This approach offers relevant and contextual solutions in junior high school mathematics education in Kota Bima.