PEMBELAJARAN BERBASIS ETNOMATEMATIKA DENGAN MEMODELKAN MOTIF BATIK GAJAH MADA

This research was based on mathematics learning in schools that are too formal and theoretical, and are less varied so it affects students' interest in learning mathematics. For this reason, a connection between mathematics outside of school and school mathematics is needed. One way that can be used is to utilize the ethnomathematics approach as the beginning of formal mathematics teaching which is suitable with the students' level of development who are at a concrete operational stage. The same thing was stated that the presence of mathematics with cultural nuances would make a major contribution to school mathematics. The objectives of this research were (1) to find out mathematical activities in the form of numerating, measuring, and calculating in batik activities. (2) To find out the mathematical concepts of geometry and geometrical transformations contained in batik motifs. This research used ethnographic research with a qualitative approach. Data collection techniques used were observation, interviews, and documentation. Data analysis technique used data reduction, data presentation, drawing conclusions and verification. The results showed that (1) in the batik activity at the Gajah Mada Tulungagung batik production house there were mathematical activities in the form of counting when determining the number of tools and materials needed, measuring fabric, calculating night requirements, calculating color comparisons, calculating waterglass requirements, and when calculating water needs. Measuring activity is seen during the process of measuring fabrics and designing batik patterns. The next step of counting activity is seen during the process of cutting fabric from 60 yards into 27 pieces, calculating the plastisin required for 2 meter fabric, and when mixing several colors. (2) There is a mathematical concept of geometry in the form of points, curved lines, triangles and circles, and the concept of geometrical transformation in the form of translatio