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All Journal International Journal of Evaluation and Research in Education (IJERE) Pythagoras: Jurnal Matematika dan Pendidikan Matematika Jurnal Penelitian dan Pengembangan Pendidikan Jurnal Pengajaran MIPA Journal on Mathematics Education (JME) Jurnal Infinity Kreano, Jurnal Matematika Kreatif-Inovatif Jurnal Didaktik Matematika Journal on Mathematics Education (JME) Lentera Pendidikan : Jurnal Ilmu Tarbiyah dan Keguruan Jurnal Riset Pendidikan Matematika AKSIOMA: Jurnal Program Studi Pendidikan Matematika Dinamika Jurnal Pendidikan Dasar Jurnal Penelitian Pendidikan Jurnal Elemen Al Ibtida: Jurnal Pendidikan Guru MI Eduma : Mathematics Education Learning and Teaching Journal of Research and Advances in Mathematics Education JPPM (JURNAL PENELITIAN DAN PEMBELAJARAN MATEMATIKA) JIPMat (Jurnal Ilmiah Pendidikan Matematika) AKSIOMA Jurnal Gantang Al-Jabar : Jurnal Pendidikan Matematika Math Didactic: Jurnal Pendidikan Matematika International Journal of Artificial Intelligence Research Union: Jurnal Ilmiah Pendidikan Matematika EDUHUMANIORA: Jurnal Pendidikan Dasar Pedagogik Pendidikan Dasar Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Analisa DWIJA CENDEKIA: Jurnal Riset Pedagogik PAEDAGOGIA PRISMA Indonesian Journal of Science and Mathematics Education Juring (Journal for Research in Mathematics Learning) PROCEEDING ICTESS (Internasional Conference on Technology, Education and Social Sciences) IndoMath: Indonesia Mathematics Education Journal of Honai Math JTAM (Jurnal Teori dan Aplikasi Matematika) Lentera: Jurnal Ilmiah Kependidikan MATEMATIKA DAN PEMBELAJARAN Beta: Jurnal Tadris Matematika Teorema: Teori dan Riset Matematika Jurnal Cendekia : Jurnal Pendidikan Matematika AT-TA`DIB JETL (Journal Of Education, Teaching and Learning) AL-ASASIYYA: Journal Of Basic Education JKPM (Jurnal Kajian Pendidikan Matematika) Indonesian Journal on Learning and Advanced Education (IJOLAE) MEJ (Mathematics Education Journal) JP3M (Jurnal Penelitian Pendidikan dan Pengajaran Matematika) Jurnal Review Pendidikan dan Pengajaran (JRPP) Jurnal Studi Guru dan Pembelajaran JE (Journal of Empowerment) Gema Wiralodra Integral : Pendidikan Matematika JPMI (Jurnal Pembelajaran Matematika Inovatif) (JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING Jurnal Absis : Jurnal Pendidikan Matematika dan Matematika Attadib: Journal of Elementary Education Jurnal Abdi: Media Pengabdian Kepada Masyarakat Abdimasku : Jurnal Pengabdian Masyarakat Range : Jurnal Pendidikan Matematika Southeast Asian Mathematics Education Journal Journal of Didactic Mathematics Mosharafa: Jurnal Pendidikan Matematika These proceedings represent the work of researchers participating in The International Conference on Elementary Education (ICEE) which is being hosted by the Elementary Education Study Programme School of Postgraduate Studies, Universitas Pendidikan Jurnal Pedagogik Pendidikan Dasar INTERNATIONAL JOURNAL OF EDUCATION, INFORMATION TECHNOLOGY, AND OTHERS Unnes Journal of Mathematics Education Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Jurnal Ilmiah Ilmu Terapan Universitas Jambi International Journal of Trends in Mathematics Education Research (IJTMER) JNPM (Jurnal Nasional Pendidikan Matematika) Badranaya: Jurnal Pengabdian kepada Masyarakat IndoMath: Indonesia Mathematics Education JRAMathEdu (Journal of Research and Advances in Mathematics Education) SIGMA DIDAKTIKA: Jurnal Pendidikan Matematika Kreano, Jurnal Matematika Kreatif Inovatif Jurnal Elementaria Edukasia Jurnal Infinity Journal on Mathematics Education Research Jurnal Pendidikan MIPA Journal on Mathematics Education Jurnal Pedagogi dan Inovasi Pendidikan Differential: Journal on Mathematics Education
Sufyani Prabawanto, Sufyani
Indonesia University Of Education
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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A praxeological analysis of linear equations in Indonesian mathematics textbooks: Focusing on systemic and epistemic aspect Fardian, Dilham; Suryadi, Didi; Prabawanto, Sufyani
Journal on Mathematics Education Vol. 16 No. 1 (2025): Journal on Mathematics Education
Publisher : Universitas Sriwijaya in collaboration with Indonesian Mathematical Society (IndoMS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22342/jme.v16i1.pp225-254

Abstract

Educational research has consistently highlighted that learning obstacles stem not only from the design of learning situations but also from curriculum structures and textbooks, which are pivotal learning resources. Despite the growing body of literature, limited studies focus on the specific challenges posed by the design of learning materials, particularly in early algebra within the Indonesian context. This study addresses the gap by analyzing the grade VII mathematics textbook in the Merdeka Curriculum, with a focus on linear equations with one variable, to uncover learning obstacles in early algebra. Utilizing Didactical Design Research (DDR), a qualitative approach, the research examines the praxeological components of the textbook—tasks (T), techniques (τ), technology (θ), and theory (Θ). The findings indicate three primary categories of learning obstacles: ontogenic, epistemological, and didactic. Notably, the analysis reveals that the design of linear equation content in the textbook is non-systemic and lacks epistemic coherence, posing significant challenges for learners. This study contributes to the understanding of curriculum design by identifying specific obstacles in the Merdeka Curriculum's grade VII mathematics textbook and underscores the need for more systemic and epistemically aligned textbook development. Future research should extend this analysis to other textbooks across various grade levels to determine if these findings are consistent within the broader curriculum framework.
How computational thinking can be integrated in statistical learning: A cuboid framework Irawan, Edi; Rosjanuardi, Rizky; Prabawanto, Sufyani
Journal on Mathematics Education Vol. 16 No. 2 (2025): Journal on Mathematics Education
Publisher : Universitas Sriwijaya in collaboration with Indonesian Mathematical Society (IndoMS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22342/jme.v16i2.pp423-448

Abstract

In the context of an increasingly data-intensive society, the integration of Computational Thinking (CT) into statistics education is essential to prepare students with the analytical and problem-solving competencies required for navigating complex data environments. Despite growing recognition of its importance, existing pedagogical practices frequently lack systematic didactical frameworks that effectively embed CT within statistical learning, particularly in higher education. Addressing this gap, the present study introduces a novel hypothetical didactical design—termed the Cuboid Framework—which systematically integrates CT components into the learning of descriptive statistics using the R programming language in a Google Colab environment. This research employed the Didactical Design Research (DDR) methodology, emphasizing the prospective and metapedadidactic stages to construct and evaluate the framework. Targeted at third-semester undergraduate students enrolled in an introductory statistics course, the Cuboid Framework aligns with learners’ developmental levels in both statistical reasoning and CT proficiency. The model is organized as a 5 × 4 × 4 structure, comprising five core statistical tasks, four structured didactical situations (action, formulation, validation, and institutionalization), and four CT elements (decomposition, pattern recognition, abstraction, and algorithmic thinking). Validation procedures included expert review through focus group discussions (FGDs) and an initial classroom implementation followed by metapedadidactic analysis. Findings reveal that the Cuboid Framework fosters a coherent learning progression, enhances students’ engagement in statistical inquiry, and supports the development of CT competencies. Classroom observations confirmed that the intentional design of didactical situations facilitates students’ cognitive adaptation to computational tasks. While preliminary analyses indicate strong theoretical and practical coherence, further retrospective studies and quantitative evaluations are necessary to ascertain the long-term effects on student learning outcomes. This study contributes a structured and theoretically grounded model for CT integration in statistics education, with implications for improving curriculum design and instructional practice in mathematics education. Future research should aim to test the scalability and efficacy of the Cuboid Framework across diverse educational settings.
Students’ Reversible Thinking Ability in Solving Quadrilateral Problems Tata Frarisia; Sufyani Prabawanto; Cece Kustiawan
Jurnal Pendidikan MIPA Vol 25, No 2 (2024): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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

Abstract

Students’ ability to engage in reversible thinking can enhance their problem- solving skills. Reversible thinking allows students to consider various perspectives, explore different options, and determine the best solution. Therefore, this study aims to describe students’ abilities to solve reversible thinking problems in the context of quadrilaterals, specifically rectangles. This research uses a qualitative method. The participants in this study were three junior high school students from Jambi, Indonesia, who demonstrated sufficient mathematical abilities. This study found that students could solve forward-thinking problems effectively but faced challenges with reversible thinking problems. This difficulty stems from students’ lack of familiarity with problems that require reversible thinking and their struggles with modeling mathematical scenarios from word problems. The study emphasizes the need to introduce more non-routine problems and exercises that encourage the exploration of various problem-solving approaches so that students can develop more flexible thinking skills.         Keywords: reversible thinking, mathematics education, problem-solving, non-routine problem.DOI: http://dx.doi.org/10.23960/jpmipa/v25i2.pp542-553
How Students Make Model and Promote Productive Struggle in Solving Mathematical Problems Melani, Rini; Herman, Tatang; Prabawanto, Sufyani; Samosir, Christina Monika; Mefiana, Syifa Ananda
JETL (Journal of Education, Teaching and Learning) Vol 9, No 1 (2024): Volume 9 Number 1 March 2024
Publisher : STKIP Singkawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26737/jetl.v9i1.5108

Abstract

Making mathematical models involves translating real-life situations into mathematical expressions. This research, conducted in three Bandung schools with 93 students, focuses on iconic and symbolic mathematical models. Findings reveal that students' abilities using these models are below the expected minimum, with symbolic models being more dominant. The score difference may be influenced by the teacher's role, students' experiences, individual abilities, and specific contexts favoring visual understanding. Students face challenges in making mathematical models, including a lack of comprehensive understanding, difficulty identifying variables, creating context-free models, and struggling with relevant visualizations. Additionally, they encounter issues using formulas and interpreting mathematical results when answering questions. In the validation stage, adjusting temporary results to real situations poses challenges. Internal factors contributing to difficulties include a lack of interest, critical limitations, and low self-confidence. External factors like a limited practical experience in making models also play a role. A holistic solution addressing both internal and external factors is essential for students to overcome challenges and enhance their ability to create mathematical models from real-world contexts. The recommended role of the productive struggle learning approach is crucial in assisting students in achieving the expected milestones.
Bahasa Inggris Aswin, Aswin; Jupri, Al; Prabawanto, Sufyani
Jurnal Gantang Vol 10 No 1 (2025): Jurnal Gantang
Publisher : Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/jg.v10i1.6920

Abstract

Computational thinking skills are systematic ways of thinking that involve formulating a problem, deconstructing the problem, and communicating the solution. The development of students' computational thinking ability is significant; therefore, knowing the obstacles is essential. The purpose of this research is to find out students' learning obstacles in computational thinking. This qualitative research uses a phenomenological approach that describes the meaning of certain concepts related to life experiences for some individuals. The population in this study is one of the high school class XI in Bulukumba district. The subjects in this study were three students in the high, medium, and low categories. Data collection techniques in this study used the following instruments: 1) math test question instrument, 2) interview. The results of this study are (1) ontogenical obstacle in the form of students having difficulty in making models (abstraction stage) because they are wrong in capturing information and do not understand in making mathematical models, (2) epistemological obstacle in the form of students having difficulty in solving problems because the problems given have never been encountered, and (3) didactical obstacle in the form of not understanding the correct writing of permissiveness, this is due to the absence of emphasis on correct permissiveness during learning. This research is expected to help teachers overcome students' computational thinking obstacles.
Students' Learning Obstacles in SPLDV Materials Related to Computational Thinking Skills Prasetyawan, Enggar; Kusumah, Yaya S.; Prabawanto, Sufyani
Jurnal Gantang Vol 10 No 1 (2025): Jurnal Gantang
Publisher : Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/jg.v10i1.7168

Abstract

Integrating computational thinking into Programme for International Student Assessment (PISA) assessments presents a significant challenge for Indonesian students, particularly in mathematics education. Despite its crucial role in problem-solving, computational thinking has not been widely implemented by students due to the presence of learning obstacles. This study aims to identify the learning obstacles that junior high school students encounter in understanding systems of linear equations in two variables, specifically about their computational thinking abilities. A qualitative approach with a phenomenological method was employed. Research instruments included a computational thinking test and a semi-structured interview guide. Data were collected from 20 students at a junior high school in Wonosobo Regency, Indonesia. Data analysis consisted of three stages: reduction, display, and conclusion. The findings reveal that students experience three types of learning obstacles—epistemological, ontogenical, and didactical when engaging with systems of linear equations in two variables, indicating that these obstacles hinder the development of their mathematical computational thinking skills.
Analysis of Students' Mathematical Representation Ability on Cube and Cuboid Topics: A Case Study in A Junior High School Simanjuntak, Sinitta Marito; Prabawanto, Sufyani
PRISMA Vol 14, No 1 (2025): PRISMA
Publisher : Universitas Suryakancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35194/jp.v14i1.4738

Abstract

This study aims to analyze the ability of mathematical representation on cube and cuboid topic in one of the junior high schools in Bandung. The research design used to achieve the objectives of this study is a case study design that is carried out to investigate students' mathematical representation skills. Data was collected from ten grade IX junior high school students through written tests in the form of descriptions and interviews. Based on the results of the data analysis described above, it can be concluded that the mathematical representation ability of grade IX students at one of the State Junior High Schools in Bandung still has many errors. This is because almost all students have not been able to solve the problems given. Two indicators used in this study, namely visual representation and representation of equations or mathematical expressions, there are still many students who solve mathematical problems that are not completed perfectly and some students are still not thorough and impetuous to find solutions to problems so that students are wrong in providing the final result.
Students learned knowledge of the concept of angle and angular measure: A didactic transposition perspective Herizal; Priatna, Nanang; Prabawanto, Sufyani; Jupri, Al
Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika Vol. 8 No. 1 (2025): Jurnal Absis
Publisher : Program Studi Pendidikan Matematika Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/absis.v8i1.3196

Abstract

The concept of angle and angular measure are essential concepts that need to be well understood in learning geometry. However, students often misunderstand these concepts. This study aimed to analyze how the shift in knowledge of the concept of angle and angle measurement in the perspective of didactic transposition. A qualitative study with a phenomenological approach was conducted to examine this phenomena. Data were collected through classroom observation, interviews, and documentation studies. The results of the study indicate that the transposition process in learning affects students' conceptualization process of the definition of angles so that students cannot distinguish between angles and anglular measure and tend to consider the two to be the same. A weak transposition process often causes errors, variations in meaning, and limited knowledge. This study emphasizes the need for a good didactic approach to bridge the gap in the transition process between scientific knowledge of mathematics and students' understanding. The implications of this study suggest that there is an alignment of both the curriculum and teaching materials that are in line with scholarly knowledge to improve students' understanding of the concept of angles and anglular measure.
PACE LEARNING MODEL AND SELF-ESTEEM ON STUDENTS' STATISTICAL LITERACY ABILITY Alman, Alman; Herman, Tatang; Prabawanto, Sufyani; Sarnav Ituga, Almuhaimin
MATEMATIKA DAN PEMBELAJARAN Vol. 13 No. 1 (2025): MATEMATIKA DAN PEMBELAJARAN
Publisher : IAIN Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33477/mp.v13i1.9284

Abstract

Statistics is the science that deals with the collection, processing, analysis, and presentation of data. In fifth grade elementary school, students learn that statistics can be used to understand information from the data they collect. This study aims to analyze the influence of the PACE (Project, Activities, Cooperative, Exercises) learning model and self-esteem on students' statistical literacy Ability. The sample of the research are fifth-grade students at Karya Baru state Elementary School in Baubau City. The method used is a Quasi-Experimental Design with a 2x3 factorial design. Data collection techniques include tests of statistical literacy Ability and self-esteem questionnaires. Data analysis is conducted using normality tests, homogeneity tests, and two-way ANOVA tests.The results of the study indicate a significant effect of the PACE learning model on students' statistical literacy abilities. No significant effect of self-esteem on statistical literacy Ability was found. Additionally, the analysis shows that there is no interaction between the PACE learning model and self-esteem in influencing students' statistical literacy Ability. This emphasizes the importance of implementing appropriate learning models to enhance statistical literacy using the PACE learning model.
The Effectiveness of Powerpoint-Assisted Contextual Teaching and Learning on Students’ Critical Thinking Skills: A Case on Geometry Material Murni, Sukma; Suryadi, Didi; Prabawanto, Sufyani; Herman, Tatang; Gumpita, Melly Terry
(JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING Vol. 8 No. 2 (2025): VOLUME 8 NUMBER 2, JUNE 2025
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jiml.v8i2.27463

Abstract

Based on the problems faced in schools from the results of interviews with the lack of student learning outcomes on the circumference and area of ​​flat shapes this is due to the lack of media and approaches used by classroom teachers, so researchers want to improve students' critical thinking skills by developing power point learning media assisted by the Canva application that can help students understand the material and various questions with critical thinking skills, as well as a contextual teaching and learning approach that makes students find out and be active in learning. The research method used is Research and Development from Borg and Gall with the following stages: 1) Research, 2) planning, 3) product development, 4) limited test, 5) Revision, 6) wider test, 7) final product . For the results of the teacher's response, 84% are in good category and 73% are in good enough category. For the results of improving students with the n-gain test, the limited trial was 0.65 and the broad trial was 0.66, including the medium category. The normality test in the limited test is 0.200 and 0.068 while for the broad test it is 0.256 and 0.813 so that the distribution is normal. Paired simples test in limited trials and wide trials 0.000 <0.05 then H0 is rejected, Ha is accepted. So there are significant and effective differences in learning.
Co-Authors A.A. Ketut Agung Cahyawan W ABDUL MUJIB Abdul Mujib Aflich Yusnita Fitrianna Agung Wicaksono Ahmad Arifuddin Ahmad Nizar Rangkuti Ahmad Tafsir Ahmad Tafsir, Ahmad Ahmad Zulfa Khotimi Ahmatika, Deti Aiyub Aiyub Alfitri, Putri Armania Agustina Alman Alman Alman Alman, Alman Aneu Pebrianti Anwar, Agus Saeful Asep Syarif Hidayat Asfar, A.M.Irfan Taufan Asfar, Andi Muhamad Iqbal Akbar Aswin Aswin Atep Sujana Augie, Kintan Tyara Bambang Eko Susilo Bambang Hariyomurti Bariyah, Nusrotul Cece Kustiawan Cecep Anwar Hadi Firdos Santosa Cecep Anwar Santosa Dadan Dasari Dadan Hermawan, Dadan Dadang Juandi Darhim Darhim Dela Ambarwati Dian Cahyawati Dian Nopiyani Dian Usdiyana Didi Suryadi Didi Suryadi Didi Suryadi Dilham Fardian Doni, Petrus Kanisius Nama Edi Irawan Ejen Jenal Mutaqin Eka Novarina EKO YULIANTO Eko Yulianto Eko Yulianto Elah Nurlaelah Elizanti, Desi Encum Sumiaty, Encum Endang Cahya Mulyaning A. Eyus Sudihartinih Fardian, Dilham Fathiyah, Ifa Fatimah, Siti Febriani, Winarti Dwi Fitri Ayu Febrianti Fitriana Lestari Fitriani Fitriani Fujiarti, Ari Ginda M.A.Siregar Gita Rani Putri Mangiri Gumpita, Melly Terry Gunadi, Farid Hadi Haeruddin, Haeruddin Hani Nurhasanah Hayuningrat, Silfia Herizal Herizal Hutkemri Zulnaidi Iden Rainal Ihsan Ifa Fathiyah Inayah, Sarah Indiana Marethi Indiana Marethi, Indiana Indra Nurhidayat Irena Puji Luritawaty Istikomah, Endang Itoh Masitoh, Itoh Jarnawi Afgani Dahlan Jozua Sabandar Jurpri, Al Jusniani, Nia Kartika Yulianti Kholipah, Nuzuliah Khotimah, Wonadesma Dwi Kintan Tyara Augie Kurniati, Nurdiyah Kurniawati, Ririn Laelasari Laelasari, Laelasari Lina Siti Nurwahidah Lukman Lukman M Akbar Gulvara M Candra Nugraha Deni Mangiri, Gita Rani Putri Masitoh, Lisda Fitriana May Nisa Istiqomah Mefiana, Syifa Ananda Meicindy Jeny Klorina Meilani, Rini Melani, Rini Mimi Hariyani Mohamad Gilar Jatisunda Mustika Fauziah, Hilma Nabila Cynthia Rayhan Nadya Syifa Utami Nanang Priatna Nandang Arif Saefuloh Nazla Nurul Aulia Panggabean Nelvita Febrina Hasan ningrum, yunia jumita Nopiyani, Dian Nopiyani, Dian Novi Andri Nurcahyono Nti, Seth Junior Nuaini, Intan Nuke Fitri Yanuari Nur Qamariah Nurannisa, Andi Nurdiyah Kurniati Permani, Kania Dewi Pertiwi, Saffanah PRASETYAWAN, ENGGAR Prihandhika, Aditya Putri, Amelia Defrianti Raisya Hizkiya Syabina Rama Nida Siregar Rama Nida Siregar Ramli Ramli Rani Sugiarni Rini Sulastri Riny Arviana Riza Fatimah Zahrah Rizki, Raihan Ahmil Rizky Rosjanuardi Rohimah, Siti Maryam Rosmayasari Rosmayasari Rosmayasari, Rosmayasari Saefuloh, Nandang Arif Saefuloh, Nandang Arif Samosir, Christina Monika Sandra Sukmaning Adji Santi, Eneng Sanusi Sanusi Saputra, Samnur Sarassanti, Yumi Sarnav Ituga, Almuhaimin Sendi Ramdhani Septian, Ari Simanjuntak, Sinitta Marito Siregar, Rama Nida Sitanggang, Damra Ali Siti Fatimah Sofa, Rostika Nurlaela Nova Maya Suhendra, S Sukma Murni Sukri Sukri suparni Syamsuri Syamsuri Syarifah, Mufarrahatus Syifa Ananda Mefiana Tata Frarisia Tatang Herman, Tatang Tin Lam, Toh Trisna Nugraha Trisnowali MS, Andi Turmudi Umbara, Uba Umbara, Uba Usep Kosasih Utami, Nadya Syifa Wafa Islamiyah Wahyu Hidayat Wahyu Sopandi Wahyudin Wahyudin Wahyudin Wahyudin Wahyudin Wahyudin Wahyudin Wardani, Ambarsari Kusuma Wenda Alifulloh Widdy Sukma Nugraha Yasin, Muhamad Yaya S. Kusumah Yeni Dwi Kurino Yeni dwi Kurino Yusuf Adhitya