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All Journal Journal on Mathematics Education (JME) JURNAL PENDIDIKAN TAMBUSAI Journal of Authentic Research on Mathematics Eduacation (JARME) Koordinat : Jurnal Pembelajaran Matematika dan Sains Mosharafa: Jurnal Pendidikan Matematika Plusminus: Jurnal Pendidikan Matematika Ethnomathematics Journal Jurnal Pengabdian Pada Masyarakat
Dedi Muhtadi, Dedi
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SUNDANESE ETHNOMATHEMATICS: MATHEMATICAL ACTIVITIES IN ESTIMATING, MEASURING, AND MAKING PATTERNS Muhtadi, Dedi; Sukirwan, Sukirwan; Warsito, Warsito; Prahmana, Rully Charitas Indra
Journal on Mathematics Education Vol 8, No 2 (2017)
Publisher : Department of Doctoral Program on Mathematics Education, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (156.54 KB) | DOI: 10.22342/jme.8.2.4055.185-198

Abstract

Mathematics is a form of culture integrated in all aspects of society, wherever there are, including the sundanese ethnic communities. This enables the mathematical concepts embedded in cultural practices and recognizes that all people develop a special way of doing mathematics called ethnomathematics activities. Sundanese ethnomathematics is mathematics in sundanese culture implemented in community activities. Sundanese ethnic sundanese people living in the area of West Java Indonesia, speaking sundanese language, and having activities  reflecting sundanese culture. Sundanese ethnomathematics in this study has three activities, namely estimating, measuring, and making patterns appearing in the activities in term of kibik (a unit for measuring volume), bata (a unit for measuring surface area), and path pihuntuan (a model of cane work).DOI: http://dx.doi.org/10.22342/jme.8.2.4055.185-198
Bahasa Matematis dalam Penentuan Waktu Siang - Malam menurut Tradisi Sunda Muhtadi, Dedi; Rochmad; Isnarto
Plusminus: Jurnal Pendidikan Matematika Vol. 1 No. 2 (2021): Juli
Publisher : Department of Mathematics Education Program IPI Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31980/plusminus.v1i2.900

Abstract

Tasikmalaya merupakan wilayah Tatar Sunda yang julukannya sebagai: “Sang Mutiara Priangan Timur”, memiliki peran penting di Provinsi Jawa Barat Selatan. Peran ini sangat berpengaruh terhadap potensi masyarakat, termasuk di bidang kebudayaan. Namun seiring dengan perkembangan zaman, budaya tersebut kurang dikenal oleh generasi muda saat ini. Tujuan dari penelitian adalah untuk melestarikan budaya masyarakat Sunda khususnya di Tasikmalaya agar budaya tersebut tetap terjaga. Penelitian ini menggunakan metode kualitatif dengan pendekatan etnografi yang bersumber dari studi literatur, observasi lapangan dan wawancara dengan seorang ahli budaya Sunda. Hasil penelitian menunjukkan bahwa terdapat bahasa matematis dalam penentuan waktu sehari semalam yang digunakan oleh masyarakat Sunda di Tasikmalaya dan hal itu dapat menjadi sebagai titik tolak untuk acuan dalam pembelajaran matematika. Tasikmalaya is a Sundanese region whose nickname is: "The Pearl of East Priangan", an important role in South West Java Province. This role is very influential on the potential of the community, including in the field of culture. But along with the times, this culture is less well known by today's young generation. The purpose of this research is for the culture of the Sundanese people, especially in Tasikmalaya so that the culture is maintained. This study uses a qualitative approach with an ethnographic approach derived from literature studies, field observations and interviews with a Sundanese cultural expert. The results of the study indicate that there is a mathematical language in the right time of day and night that is used by the Sundanese people in Tasikmalaya and it can be a starting point to be used as a reference in learning mathematics.
EXPLORING JEPARA WOODCARVING ART AS AN ALTERNATIVE FOR CULTURE-BASED MATHEMATICS LEARNING Utami, Rahmi Nur Fitria; Muhtadi, Dedi; Solihah, Silvi
Ethnomathematics Journal Vol. 5 No. 2 (2024): September
Publisher : Ethnomath Association in cooperation with Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ej.v5i2.76440

Abstract

Culturally-based mathematics learning becomes an important alternative to overcome students' learning difficulties. One relevant cultural product is Jepara Carving Art, which contains geometric concepts as part of ethnomathematics. This study aims to describe the mathematical concepts embedded in Jepara carving art and implement them as an alternative culturally-based mathematics learning method. Using a qualitative approach, data were collected through interviews, observations, and field notes, with the research subjects being Jepara carving artisans. The results show that the mathematical concepts integrated into Jepara carving art include points, lines, angles, slopes (gradients), plane geometry, circles, solid geometry, congruence, and geometric transformations such as reflection and rotation. Additionally, the ethnomathematics of Jepara carving art can be implemented as an alternative culturally-based mathematics learning method, where several ethnomathematical activities relate to school mathematics materials. These findings emphasize the importance of linking local culture with mathematics learning to enhance students' understanding. Therefore, this study recommends the inclusion of Jepara carving art in the curriculum as an effective strategy for culturally-based mathematics learning.
LEARNING DESIGN OF EXPONENTIAL NUMBERS THROUGH THE DESIGN OF A HYPOTHETICAL LEARNING TRAJECTORY USING DISCOVERY LEARNING Muhtadi, Dedi; Yulianto, Eko; Hermanto, Redi; Virawanti, Tiana
Journal of Authentic Research on Mathematics Education (JARME) Vol 6, No 1 (2024)
Publisher : Program Studi Magister Pendidikan Matematika, Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jarme.v6i1.8889

Abstract

This research aims to develop an effective learning design for understanding the concept of exponentiation by applying the Discovery Learning model using the Hypothetical Learning Trajectory (HLT) as the framework foundation. The research method used is a design research method consisting of three main stages: preliminary design, teaching experiment, and retrospective analysis. The initial stage involves literature analysis and the design of an HLT tailored to the concept of exponentiation. The instructional design is based on the prepared HLT and tested through two experimental stages: pilot experiment and teaching experiment. Retrospective analysis is conducted to compare the initial HLT with the Actual Learning Trajectory (ALT) achieved during the learning process. Data is collected through observation to monitor learning activities and environmental conditions, as well as through recordings of learning activities to gain an understanding of student participation in the design experiments. Additionally, Student Worksheets (SW) are used as aids for students to understand the concept of exponentiation, and evaluation questions are used to measure students' learning outcomes in the subject matter. Interviews are also conducted to gain a deeper understanding from the student's perspective. The results of this research make a significant contribution to the development of more effective mathematics learning methods, particularly in understanding the concept of exponentiation, and provide guidance for teachers to design learning that is more relevant to students' daily lives. The implications of the research results provide guidelines for teachers in designing learning that is more relevant to students' daily lives.
LEARNING TRAJECTORY PESERTA DIDIK BERDASARKAN ARGUMENTASI MATEMATIS Firdaus, Naufal; Supratman, Supratman; Muhtadi, Dedi; Ratnaningsih, Nani
Journal of Authentic Research on Mathematics Education (JARME) Vol 5, No 2 (2023)
Publisher : Program Studi Magister Pendidikan Matematika, Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jarme.v5i2.5970

Abstract

Penelitian ini bertujuan untuk menganalisis learning trajectory peserta didik berdasarkan argumentasi matematis. Penelitian menggunakan kualitatif-deskriptif dengan pendekatan eksploratif. Subjek penelitian diambil secara purposive sebanyak empat orang peserta didik kelas VIII SMP Islam Terpadu Qoshrul Muhajirin berdasarkan learning trajectory peserta didik dan tipe argumentasi. Data dikumpulkan menggunakan tes argumentasi matematis, tes tipe argumentasi dan wawancara tidak terstruktur. Teknik analisis data meliputi reduksi data, penyajian data dan penarikan kesimpulan. Hasil penelitian menyimpulkan: (1) learning trajectory peserta didik pada tipe argumentasi matematis induktif yaitu menyelesaikan permasalahan dengan memanfaatkan gambar pada soal. (2) learning trajectory peserta didik pada tipe argumentasi matematis aljabar menggunakan rumus khusus dalam menyelesaikan masalah. (3) learning trajectory peserta didik pada tipe argumentasi matematis pictorial menggunakan ilustrasi gambar dengan rumus dalam menyelesaikan masalah.  (4) learning trajectory peserta didik pada tipe argumentasi matematis perseptual dengan menggunakan bantuan ilustrasi gambar pada soal serta membuktikannya dengan rumus terstruktur.
ANALYSIS OF STUDENTS' DIFFICULTIES IN SOLVING PROPORTIONAL COMPARISON PROBLEMS Tito, Alya Sa’diyah Azzahra Putri; Muhtadi, Dedi; Sukirwan, Sukirwan; Suhaya, Suhaya
Journal of Authentic Research on Mathematics Education (JARME) VOL 6 NO 2 (2024)
Publisher : Program Studi Magister Pendidikan Matematika, Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jarme.v6i2.11498

Abstract

This study aims to analyze the difficulties students face in solving problems related to proportional comparison. This study employs a case study method based on the errors made by students in solving problems related to proportional comparison. Four students were selected as a theoretical sample from a group of 34 seventh-grade students at the junior high school in Tasikmalaya. These students were chosen due to their complex levels of errors, which included procedural errors, incomplete solutions, and mistakes in determining mathematical formulas. The results of the study indicate that students experience difficulties in solving proportional comparison problems, including: (1) difficulty in understanding mathematical language, (2) difficulty in understanding word problems, (3) the influence of mathematics anxiety, and (4) differences in learning styles. Interviews and classroom observations revealed that factors such as less varied teaching methods, a lack of contextual practice, and low learning motivation contribute to the difficulties experienced by students. The discussion of the research results emphasizes the importance of more interactive and contextual teaching approaches to enhance students' understanding of the concept of proportional comparison. The implications of this study highlight the need for the development of more innovative teaching materials and the use of educational technology to help students overcome these difficulties.
MATHEMATICAL AESTHETICS OF JEPARA'S CARVING Fitria Utami, Rahmi Nur; Muhtadi, Dedi; Hermanto, Redi
Journal of Authentic Research on Mathematics Education (JARME) Vol 5, No 1 (2023)
Publisher : Program Studi Magister Pendidikan Matematika, Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jarme.v5i1.5692

Abstract

Jepara's carving is a work of art with a mathematical concept of aesthetic value. Mathematical aesthetics refers to the relationship between mathematics and aesthetic values, namely the beauty of mathematics integrated with the art of Jepara's carving. The qualitative descriptive method is used to describe aesthetics and mathematical concepts in Jepara's carving and the relationship between the two focuses of the study. Data were collected using semi-structured interviews, non-participatory observation, and documentation. The research subjects consisted of two informants: art and culture teachers and Jepara's carving artisans. The data were analyzed using the Miles and Huberman model, which consisted of the following stages: data reduction, data presentation, and conclusion drawing. The results showed that: (1) Jepara's carving has aesthetic value, seen from the fulfillment of aesthetic elements, namely: unity, complexity, sincerity, and balance; (2) the process of making Jepara's carving applies the mathematical concept of comparison, which plays an essential role in making Jepara's carving patterns; and (3) there is a collaboration between the application of mathematical concepts and aesthetic theory in creating the term mathematical aesthetics in Jepara's carving which refers to geometric aesthetics, wherein this Jepara's carving motif there is a regularity of patterns dominated by   .
Technological, pedagogical, and content knowledge: Merancang Pembelajaran Matematika yang Powerful Muhtadi, Dedi; Yulianto, Eko; Mansyur, Muhammad Zulfikar; Sukirwan, Sukirwan
Jurnal Pengabdian Pada Masyarakat Vol 9 No 3 (2024): Jurnal Pengabdian Pada Masyarakat
Publisher : Universitas Mathla'ul Anwar Banten

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Tujuan pengabdian ini adalah untuk memberikan pelatihan dan workshop perancangan pembelajaran matematika bagi guru sekolah dasar dengan fokus pada integrasi Technological, Pedagogical, and Content Knowledge (TPACK). TPACK merupakan pengetahuan profesionalisme guru yang penting untuk mengintegrasikan teknologi dalam pembelajaran, membantu guru merancang pembelajaran yang efektif dan efisien, mulai dari penyusunan skenario, skema alur, perangkat, praktik, hingga evaluasi dan refleksi pembelajaran. Metode pengabdian ini melibatkan pelatihan dan workshop yang diselenggarakan dalam bentuk seminar, pelatihan, pendampingan, Focus Group Discussion, dan simulasi. Kegiatan ini diikuti oleh 30 peserta yang merupakan guru inti dari seluruh Sekolah Dasar Negeri di wilayah Kecamatan Cisayong Kabupaten Tasikmalaya. Kegiatan dilaksanakan mulai tanggal 29 Juli hingga 19 Agustus 2023, bertempat di SD Negeri Inpres Cigorowong. Hasil pengabdian menunjukkan bahwa peserta dapat menyusun skenario, skema alur, serta perangkat pembelajaran berbasis TPACK, termasuk RPP, bahan ajar, LKPD, media berbasis Applet Geogebra, dan instrumen evaluasi. Diskusi dari hasil pengabdian ini menunjukkan bahwa pelatihan dan workshop ini efektif dalam meningkatkan pemahaman dan keterampilan guru dalam merancang pembelajaran matematika yang terintegrasi dengan teknologi. Implementasi dari hasil pengabdian ini diharapkan dapat meningkatkan kualitas pembelajaran matematika di sekolah dasar, memperkuat peran TPACK dalam pengajaran, dan memberikan dampak positif pada proses pembelajaran dan prestasi siswa. The purpose of this study is to provide training and workshops on designing mathematics teaching for elementary school teachers with a focus on integrating Technological, Pedagogical, and Content Knowledge (TPACK). TPACK is a crucial aspect of teachers' professionalism, enabling the integration of technology into teaching, assisting teachers in designing effective and efficient teaching, ranging from the development of teaching scenarios, lesson flow schemes, teaching tools, teaching practices, to evaluation and reflection on teaching. The research methodology involves training and workshops conducted in the form of seminars, training sessions, mentoring, Focus Group Discussions, and simulations. This activity is attended by 30 participants who are core teachers from all public elementary schools in the Cisayong District, Tasikmalaya Regency. The activity takes place from July 29 to August 19, 2023, at SD Negeri Inpres Cigorowong. The research findings indicate that participants are able to formulate teaching scenarios, lesson flow schemes, and TPACK-based teaching tools, including lesson plans, teaching materials, worksheets, Applet Geogebra-based media, and evaluation instruments. Discussion of the research results indicates that these training and workshops are effective in enhancing teachers' understanding and skills in designing technology-integrated mathematics teaching. The implementation of these research findings is expected to enhance the quality of mathematics teaching in elementary schools, strengthen the role of TPACK in teaching, and have a positive impact on the teaching process and students' achievement.
DESIGNING HYPOTHETICAL LEARNING TRAJECTORIES FOR SET THEORY USING SCHOOL SNACK CONTEXTS IN MIDDLE SCHOOL Muhtadi, Dedi; Sukirwan, Sukirwan; Yulianto, Eko; Fauzi, Rival Muhamad
Journal of Authentic Research on Mathematics Education (JARME) Vol 7, No 1 (2025)
Publisher : Program Studi Magister Pendidikan Matematika, Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jarme.v7i1.13665

Abstract

This study aims to design and implement Hypothetical Learning Trajectory (HLT) on set material with the context of school snacks for Junior High School students. The main focus of this study is to support students' understanding of basic set concepts, such as subsets, intersections, and unions, through a contextual approach that is relevant to students' daily lives. The research method used is educational design research, which includes the planning, implementation, and analysis phases of learning outcomes. The subjects of the study were grade VII students at a junior high school in Tasikmalaya City. The research instruments included: observation sheets, concept understanding tests, and interviews to explore students' thinking processes during learning. The results showed that the use of the school snack context was relevant to the topic of sets and was able to increase students' interest and motivation in learning set material. Students' conceptual understanding also increased significantly, especially in identifying set elements, as well as understanding intersections and unions between sets through visual representations and group activities. The discussion of these results emphasizes that HLT with everyday contexts, such as school snacks, provides opportunities to link abstract material to students' real experiences, thus facilitating meaningful learning. The implementation of this research provides practical implications for teachers in designing context-based learning that can be used for other materials, as well as a reference for developing a curriculum that is more relevant to life. 
ANALISIS KESULITAN SISWA DALAM MENYELESAIKAN LUAS PERMUKAAN DAN VOLUME PRISMA Fadilah, Julva Rizky; Muhtadi, Dedi; Sukirwan
Koordinat Jurnal MIPA Vol. 5 No. 2 (2024)
Publisher : Program Studi Tadris Ilmu Pengetahuan Alam, Fakultas Tarbiyah dan Ilmu Keguruan (FTIK), Universitas Islam Negeri (UIN) Datokarama Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24239/koordinat.v5i2.92

Abstract

This study aims to identify and analyze the difficulties students face in solving problems related to the surface area and volume of prisms. The research employs a qualitative method, using data collection techniques such as observation, interviews, and document analysis involving 32 eighth-grade students at a public junior high school in Tasikmalaya. The data analysis technique used in this study is data triangulation. The findings reveal that 71.9% of students experience difficulties in understanding the basic concept of prisms, 34.3% struggle with applying formulas, and 15.6% have difficulty visualizing the shape of prisms. The discussion in this study emphasizes conceptual and procedural issues. The implications of this research significantly impact curriculum development and mathematics teaching methods in schools. Additionally, the findings can serve as a benchmark for educators in designing more effective learning strategies that focus on concept comprehension, visualization, and accurate formula application, as well as the development of more interactive teaching materials
Co-Authors Apiati , Vepi Ardhiansah, Dian EKO YULIANTO Fadilah, Julva Rizky Fauzi, Rival Muhamad Firdaus, Naufal Fitria Utami, Rahmi Nur Ibriz, Faradisa Amanda Isnarto Lia Rahmawati, Lia Mansyur, Muhammad Zulfikar Nani Ratnaningsih Redi Hermanto RR. Ella Evrita Hestiandari Rully Charitas Indra Prahmana Solihah, Silvi Suhaya Suhaya, Suhaya Sukirwan Sukirwan Sukirwan Supratman Supratman, Supratman Tito, Alya Sa’diyah Azzahra Putri Utami, Rahmi Nur Fitria Veni Rahayu, Diar Virawanti, Tiana Warsito Warsito