Ethnomathematics: Increased Understanding of Mathematical Concepts in Debus and Patingtung Arts Banten Indonesia

Purpose: This study aims to find out how students' ability to understand mathematical concepts after being given ethnomathematics learning and to find out the increase in students' mathematical understanding abilities after being given ethnomathematics learning to class IXB students of Mts mathla'ul falah siremen.
Methodology: This research is a descriptive qualitative research. Data collection techniques used were observation, distributing questionnaires, interviews, and testing students' ability to understand mathematical concepts. The research instrument used was an interview sheet with the leadership of Debus Surosoan and students and a test of students' ability to understand mathematical concepts. The analysis technique used in this study is the analysis of the results of the observation sheet, analysis of the results of interviews with the head of Padepaokan Debus Surosoan and students, and analysis of the test results for students' ability to understand mathematical concepts using the N gain test. Description analyst to find out the increase in the understanding of mathematical concepts of Class IXB students at Mts mathla'ulfalah siremen.
Results: The results of the study stated that after learning about ethnomathematics in geometrical learning, namely tubes, there was an increase of 24% from the test results of the application of ethnomathematics in the arts of debus and patingtung, from the results of the N gain test the increase was declared ineffective because it had a less accumulated percentage of 40% which is only 36%.
Conclusion: Increased mathematical comprehension ability of
students after being given learning Ethnomathematics has increased, learning using the Debus and Patingtung ethnomathematical approaches in terms of the results of trials to get the accumulated scores of students after learning with an ethnomathematical approach has increased by 24% with pretty good criteria so that learning with the Debus and Patingtung ethnomathematical approaches is quite well used in mathematics learning in the classroom.