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All Journal International Journal of Electrical and Computer Engineering JPMS (Jurnal Pendidikan Matematika dan Sains) Jurnal Nalar Pendidikan Jurnal Pengajaran MIPA Journal on Mathematics Education (JME) Jurnal Infinity Kreano, Jurnal Matematika Kreatif-Inovatif International Journal of Education Journal on Mathematics Education (JME) Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Jurnal Online Pendidikan Matematika Kontemporer AKSIOMA: Jurnal Program Studi Pendidikan Matematika Jurnal Pendidikan Matematika RAFA Mimbar Sekolah Dasar Profesi Pendidikan Dasar SIGMA: Jurnal Pendidikan Matematika Mimbar Pendidikan: Jurnal Indonesia untuk Kajian Pendidikan Jurnal Elemen AdMathEduSt: Jurnal Ilmiah Mahasiswa Pendidikan Matematika EDU-MAT: Jurnal Pendidikan Matematika Eduma : Mathematics Education Learning and Teaching Jurnal Gantang Al-Jabar : Jurnal Pendidikan Matematika Jurnal Kajian Pembelajaran Matematika Al Ishlah Jurnal Pendidikan KALAMATIKA Jurnal Pendidikan Matematika Emerging Science Journal Didaktis: Jurnal Pendidikan dan Ilmu Pengetahuan Jurnal Analisa DWIJA CENDEKIA: Jurnal Riset Pedagogik PAEDAGOGIA IndoMath: Indonesia Mathematics Education JTAM (Jurnal Teori dan Aplikasi Matematika) Beta: Jurnal Tadris Matematika JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Cendekia : Jurnal Pendidikan Matematika Journal of Educational Research and Evaluation Prima: Jurnal Pendidikan Matematika International Conference on Mathematics and Science Education of Universitas Pendidikan Indonesia PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat FIBONACCI: Jurnal Pendidikan Matematika dan Matematika Symmetry: Pasundan Journal of Research in Mathematics Learning and Education Jurnal Perspektif Journal of Authentic Research on Mathematics Eduacation (JARME) M A T H L I N E : Jurnal Matematika dan Pendidikan Matematika JPMI (Jurnal Pembelajaran Matematika Inovatif) Jurnal Padegogik Pasundan Journal of Mathematics Education : Jurnal Pendidikan Matematika Indonesian Journal of Social Research (IJSR) 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 Plusminus: Jurnal Pendidikan Matematika Unnes Journal of Mathematics Education Inovasi Matematika (Inomatika) Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Jurnal Riset Pendidikan Matematika Jakarta Edumatica: Jurnal Pendidikan Matematika Eduvest - Journal of Universal Studies JNPM (Jurnal Nasional Pendidikan Matematika) Lemma: Letters of Mathematics Education ICONESTH IndoMath: Indonesia Mathematics Education Kreano, Jurnal Matematika Kreatif Inovatif Hipotenusa: Journal of Mathematical Society Jurnal Infinity Journal on Mathematics Education Research Jurnal Pendidikan MIPA Jurnal Pendidikan Progresif Jurnal Abdimas Bencoolen Mathematics Education Journal Journal on Mathematics Education Jurnal Didaktik Matematika
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STUDENT'S LEARNING DIFFICULTIES ON MATHEMATICAL UNDERSTANDING OF A NUMBER PATTERN Ratu Sarah Fauziah Iskandar; Darhim Darhim; Jarnawi Afgani Dahlan; Al Jupri
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 14, No 1 (2025)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/ajpm.v14i1.9677

Abstract

Number patterns are a fundamental aspect of mathematics, often serving as a bridge between arithmetic and algebra. Number patterns often require students to think abstractly, identifying relationships and rules that govern the sequence of numbers. For some people, this transition from concrete to abstract thinking can be difficult. Encouraging students to visualize patterns using concrete objects or images can help bridge this gap, making abstract concepts more real. The aim of this study was to investigate the students' difficulties and how grade 9 students' mathematics approaches to number pattern problems. 32 students from a junior high schools in Tangerang participated in this case study. Purposive sampling technique is used in this study. The stages of the preliminary study involve interviewing the mathematics teacher regarding learning, administering preliminary exams, and evaluating the outcomes of the preliminary exams. Research data was collected through tests and interviews. These interviews took place post the analysis of initial test (a diagnostic tests). The result showed that the difficulty in discerning the regularity of the numerical arrangement: 1) In calculating the formula for the nth term in a number pattern, modeling is used; 2) Students frequently employ the direct proportion method to generalize patterns without taking into account the overall arrangement of numbers; 3) Observing the arrangement of numbers causes uncertainty in seeing order; 4) In generalizing number patterns, damage occurs; 5) illustrating that number patterns always have regularities, and these regularities are not always in the form of numerical differences.Pola bilangan adalah aspek mendasar dari ilmu matematika dan sering kali dianggap sebagai jembatan antara aritmatika dan aljabar. Pola bilangan mengharuskan siswa untuk berpikir abstrak, mengidentifikasi hubungan dan aturan yang mengatur barisan bilangan. Bagi sebagian orang, transisi dari pemikiran konkrit ke abstrak bisa jadi sulit. Mendorong siswa untuk memvisualisasikan pola menggunakan objek atau gambar konkret dapat membantu menjembatani kesenjangan ini, menjadikan konsep abstrak menjadi lebih nyata. Tujuan dari penelitian ini adalah untuk menyelidiki kesulitan siswa terhadap masalah pola bilangan pada siswa kelas 9. Adapun subjek dalam penelitian studi kasus ini adalah 32 orang siswa SMP di Tangerang. Teknik pengambilan sampel adalah dengan menggunakan teknik purposive sampling. Tahapan studi pendahuluan meliputi wawancara kepada guru matematika mengenai pembelajaran, pelaksanaan tes awal, dan evaluasi hasil ujian. Data penelitian dikumpulkan melalui tes dan wawancara. Wawancara ini dilakukan pasca analisis tes awal (tes diagnostik). Hasil penelitian menunjukkan bahwa kesulitan dalam membedakan keteraturan susunan bilangan: 1) Menggunakan pemodelan dalam menghitung rumus suku ke-n suatu pola bilangan; 2) Siswa sering menggunakan metode perbandingan langsung untuk menggeneralisasi pola tanpa memperhitungkan susunan bilangan secara keseluruhan; 3) Mengamati susunan bilangan menimbulkan ketidakpastian dalam melihat keteraturan; 4) Dalam menggeneralisasi pola bilangan, terjadi ketidaksesuaian; 5) menggambarkan bahwa pola bilangan selalu mempunyai keteraturan, dan keteraturan tersebut tidak selalu berupa perbedaan angka.
Systematic literature review: relational thinking ability in mathematics Masitoh, Lisda Fitriana; Prasetyawan, Enggar; Juandi, Dadang; Darhim, Darhim
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.v10i1.7167

Abstract

Research on relational thinking has been widely conducted; however, no analysis of these studies has been carried out so far. This research aims to analyze the distribution of research related to relational thinking in mathematics at elementary and high school levels, which was conducted from 2016 to April 2024. This study employs the Systematic Literature Review (SLR) method, focusing on articles indexed in Scopus, ERIC, ScienceDirect, and Google Scholar. The results of the Systematic Literature Review (SLR) show that: (1) there were 30 studies on relational thinking ability in mathematics conducted; (2) eight studies were conducted abroad, while 22 were conducted in Indonesia; (3) arithmetic was the most common topic in research on relational thinking; (4) the majority of studies on relational thinking ability have been carried out at the junior high school level; (5) of the 30 articles, 14 are indexed in Sinta, 7 in Scopus, and 9 are indexed only in Google Scholar; (6) there are two definitions of relational thinking used by researchers. These findings serve as a basis for determining future research topics related to relational thinking ability.  
IDENTIFYING LEARNING OBSTACLES OF SEVENTH-GRADE STUDENTS IN QUADRILATERAL TOPICS Kadir, Kamaliyah; Fatimah, Siti; Darhim, Darhim; Rusli, Andi Zahrah Muflihah
JURNAL NALAR PENDIDIKAN Vol 12, No 2 (2024): JURNAL NALAR PENDIDIKAN
Publisher : Lembaga Penelitian Mahasiswa Penalaran UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jnp.v12i2.66142

Abstract

This study identifies and describes the types of learning obstacles and the factors that cause them in seventh-grade students learning quadrilateral material. The qualitative method used in this research focuses on teaching barriers experienced by students at SMPN 2 Sampit. Data were collected through observation, interviews, written tests, analysis of student answers, and documentation. The results of the study showed that students faced three main types of obstacles, namely ontogeny obstacle (mental readiness, lack of motivation and enthusiasm), didactical obstacle (classical way of teaching and without involving students, less than optimal use of teaching materials using only LKS), and epistemology obstacle (limited context and also low mastery of material owned by students)
Analisis Kemampuan Dekomposisi Computational Thinking Siswa Pada Materi Sistem Persamaan Linear Dua Variabel Solehudin, Solehudin; Darhim, Darhim; Herman, Tatang
Jurnal Perspektif Vol 8 No 2 (2024): Jurnal Perspektif: Volume 8 Nomor 2 Tahun 2024
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jp.v8i2.304

Abstract

Kemampuan Computational Thinking (CT) adalah kemampuan penting abad ke-21 yang harus dimiliki oleh semua orang karena diprediksi akan menjadi keterampilan dasar layaknya membaca dan menulis. Kemampuan ini diyakini mampu mengantarkan generasi masa depan untuk dapat berhasil, baik dalam karier maupun kehidupan pribadinya. Tujuan penelitian ini adalah mengkaji lebih dalam mengenai kemampuan dekomposisi yang menjadi akar sekaligus kekuatan dari CT, dengan fokus pada kerangka Cognitive Computational Thinking. Penelitian ini merupakan penelitian kualitatif yang bersifat deskriptif. Subjek dalam penelitian ini adalah kelas VIII SMP Negeri yang ada di Kabupaten Sukabumi dengan jumlah siswa sebanyak 35 orang. Instrumen yang digunakan berupa tes tertulis, wawancara siswa dan guru. Analisis data dilakukan dengan menggunakan analisis data kualitatif yang meliputi tahap reduksi data, penyajian data, verifikasi, serta kesimpulan. Hasil penelitian menunjukkan bahwa kemampuan dekomposisi CT siswa masih rendah. Hal ini disebabkan karena siswa belum pernah diberikan soal-soal berbasis CT dan guru juga belum familiar dengan kemampuan penting ini sehingga belum pernah menerapkannya pada pembelajaran di kelas.
Pengembangan E-Modul Interaktif Berbasis HTML 5 Package Materi Rasio melalui Pendekatan Representasi Matematis Sugilar, Hamdan; Herman, Tatang; Darhim, Darhim
Jurnal Perspektif Vol 9 No 1 (2025): Jurnal Perspektif
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jp.v9i1.322

Abstract

Pengembangan e-modul interaktif dengan pendekatan refresentasi matematis menjadi salah satu bahan ajar materi rasio. Tujuan penelitian ini untuk mengembangkan sumber belajar berupa e-modul interaktif berbasis HTML5 Package untuk meningkatkan kemampuan representasi matematis. Metode yang digunakan adalah penelitian dan pengembangan (research and development) dengan model ADDIE (Analysis, Design, Development, Implementation, and Evaluation). Sumber data didapatkan dari validator materi, validator media, peserta didik kelas VII Salah satu SMPN di Kabupaten Bandung. Analisis data untuk pengembangan e-modul interaktif berbasis HTML5 Package kriteria sangat valid dari ahli materi dan ahli media, memperoleh kriteria praktis dari peserta didik, dan efektif dalam peningkatan kemampuan representasi matematis. Hasil penelitian menunjukan bahwa e-modul interaktif berbasis HTML5 Package bisa menjadi sumber belajar untuk mempelajari materi rasio dimanapun dan kapanpun karena praktis, efisien, dan mampu meningkatkan motivasi dan kemampuan refresentasi matematis siswa.
Students’ mathematical problem-solving ability based on teaching models intervention and cognitive style Son, Aloisius Loka; Darhim; Fatimah, Siti
Journal on Mathematics Education Vol. 11 No. 2 (2020): Journal on Mathematics Education
Publisher : Universitas Sriwijaya in collaboration with Indonesian Mathematical Society (IndoMS)

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

Abstract

The study aimed to analyze the interaction effect teaching models and cognitive style field dependent (FD)-field independent (FI) to students’ mathematical problem-solving ability (MPSA), as well as students' MPSA differences based on teaching models and cognitive styles. Participants in this study were 145 junior high school students, with details of 50 students learning through the Connect, Organize, Reflect, and Extend Realistic Mathematics Education (CORE RME) model, 49 students use the CORE model, and 46 students use the Conventional model. Data collection tools used are the MPSA test, and the group embedded figure test (GEFT). The MPSA test finds out that there are interaction effect teaching models and cognitive styles on students' MPSA, as well as a significant difference in MPSA students who study through the CORE RME model, CORE model, and Conventional model. Based on cognitive style, between students who study through CORE RME model, CORE model, and Conventional model found that there was no significant difference in MPSA between FI students. Furthermore, there were significant differences in MPSA between FD students and also MPSA of FI students better than MPSA FD students. Therefore, teaching models and student cognitive styles are very important to be considered in the learning process, so students are able to solve mathematical problems.
Students' Learning Obstacles in Relational Thinking on Arithmetic, Algebra, and Linear Equations in One Variable Masitoh, Lisda Fitriana; Prabawanto, Sufyani; Darhim, Darhim; Jurpri, Al
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol 13, No 3: July 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v13i3.15427

Abstract

Various studies on relational thinking have been conducted, but none have explicitly examined students’ learning obstacles from the ontogenetic, epistemological, and didactical perspectives. This study aims to identify and describe students’ learning obstacles in relational thinking within arithmetic, algebra, and linear equations in one variable. This study employs a qualitative approach guided by Miles and Huberman’s framework, which involves data collection, data reduction, data display, and drawing and verifying conclusions. The study used tests and interviews to gather information. Data were collected in August 2023 from 32 students of 8th grade at SMPN 17 Tangerang Selatan. Analysis revealed that students encountered ontogenetic, didactical, and epistemological obstacles when solving mathematics problems requiring relational thinking. The ontogenetic obstacle manifested as a lack of confidence in their own mathematical abilities. The didactical obstacle arose from the use of instructional materials and learning designs that did not facilitate development of relational thinking ability. The epistemological obstacle was evident in students’ failure to understand arithmetic and algebraic operation rules, inability to construct mathematical models from everyday situations, and misinterpretation of the equals sign (“=”) as an operational command rather than a symbol of equality. Teachers therefore require additional learning resources to reinforce students’ understanding of the concept of equality. Future research should focus on developing and evaluating instructional designs specifically aimed at enhancing students’ relational thinking ability.
Penerapan Model Pembelajaran Kooperatif Tipe CRH (Course, Review, Horray) Untuk Meningkatkan Kemampuan Pemahaman Matematis Siswa SMP Auliya, Risma Nurul; ., Darhim; Nurlaelah, Elah
Pasundan Journal of Mathematics Education : Jurnal Pendidikan Matematika Vol. 4 No. 1 (2014): Pasundan Journal of Mathematics Education : Jurnal Pendidikan Matematika
Publisher : Program Magister Pendidikan Matematika, Pascasarjana, Universitas Pasundan in collaboration with Asosiasi Guru Matematika Indonesia (AGMI) and Indonesian Mathematics Educators' Society (IMES)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/pjme.v4i1.2499

Abstract

The aim of research are examining the application of cooperative learning model with CRH (Course, Review, Horray) type to improve student’s mathematical understanding ability. The research utilized a quasi experimental design. The population in this research are students in grade eight from one of junior high school in South Jakarta. As concern, the sample comprised of 32 students in CRH class (experiment group) and 34 students in conventional class (control group) which choosed by using purposive sampling technique. The problems are to improve mathematical understanding ability The quantitative analysis is used independent sample t-test, while qualitative analysis used a descriptive one. The result shows better increasing mathematical understanding ability by cooperative learning model applied CRH than by conventional teaching.
Penerapan Model Pembelajaran Kooperatif Tipe CRH (Course, Review, Horray) Untuk Meningkatkan Kemampuan Pemahaman Matematis Siswa SMP Auliya, Risma Nurul; ., Darhim; Nurlaelah, Elah
Pasundan Journal of Mathematics Education : Jurnal Pendidikan Matematika Vol. 2 No. 2 (2012): Pasundan Journal of Mathematics Education : Jurnal Pendidikan Matematika
Publisher : Program Magister Pendidikan Matematika, Pascasarjana, Universitas Pasundan in collaboration with Asosiasi Guru Matematika Indonesia (AGMI) and Indonesian Mathematics Educators' Society (IMES)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/pjme.v2i2.2646

Abstract

Penelitian ini bertujuan untuk mengkaji penerapan model pembelajaran kooperatif tipe CRH (Course, Review, Horray) untuk meningkatkan kemampuan pemahaman matematis siswa SMP. Desain penelitian yang digunakan adalah kuasi eksperimen. Populasinya, yaitu seluruh siswa SMP kelas VIII di salah satu SMP Negeri Jakarta Selatan. Adapun, sampelnya terdiri dari 32 siswa kelas CRH (kelompok eksperimen) dan 34 siswa kelas konvensional (kelompok kontrol) yang dipilih menggunakan teknik purposive sampling. Masalah yang diteliti, yaitu peningkatan kemampuan pemahaman matematis. Analisis kuantitatif menggunakan independent sample t-test, sedangkan analisis kualitatif dilakukan secara deskriptif. Hasil penelitian menunjukkan peningkatan kemampuan pemahaman matematis siswa yang mendapatkan pembelajaran dengan model pembelajaran kooperatif tipe CRH lebih baik daripada siswa yang mendapatkan pembelajaran konvensional.
Implementation of react strategy to develop mathematical representation, reasoning, and disposition ability Sari, Delsika Pramata; Darhim
Journal on Mathematics Education Vol. 11 No. 1 (2020): Journal on Mathematics Education
Publisher : Universitas Sriwijaya in collaboration with Indonesian Mathematical Society (IndoMS)

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

Abstract

The purpose of this study was to describe how to implement the REACT strategy to develop students’ mathematical representation, reasoning, and disposition ability. This research was a descriptive study with a qualitative approach. The subject of this study was grade 8 junior high school student in Bandung. Data collection techniques in this study with observations, interviews, and documentation. Based on data analysis results, it could be concluded that REACT strategies can be applied to develop a mathematical representation, reasoning, and disposition ability that engages students actively. Implementation of the REACT strategy runs smoothly and gets enthusiastic responses from students. The application of REACT strategies should be undertaken sustainably so that the learning objectives can be achieved by integrating various mathematical skills that were capable.
Co-Authors A Aristika A Jupri A Nurainy A Rohmah Adi Nurjaman, Adi Alberta Parinters Makur Aloisius Loka Son Amril, La Ode Andhin Dyas Fitriani Andini Dwi Rachamwati Andini Dwi Rachmawati Anggita Maharani Anwar, Vita Nova Aristika, Ayu Asih, Endang Cahya Mulyaning Audra Pramitha Muslim Audra Pramitha Muslim, Audra Pramitha Azis, Fadli Azmidar Azmidar Azmidar Azmidar, Azmidar Bambang A.P Martadiputra Bambang Avip Priatna Martadiputra cakrawala Bambang Eko Susilo Bana Kartasasmita Bana Kartasasmita Bernadetha Silaban Bernadetha Silaban Bill Chairy Rizki Bustaren Bonita Hirza Budi Rianto Dadan Dasari Dadan Rahmat Dadang Juandi Dadang Juandi Dahlan, Jarnawi Afghani Damianus Dao Samo Delsika Pramata Sari Diar Veni Rahayu Didi Suryadi Dini Andiani, Dini Ditasona, Candra Dzulfikar, Ahmad Edi Supriyadi Edy Surya Edy Surya Elah Nurlaelah Elvandri Yogi Pratama Endang Cahya Mulyaning A. Eris Iswara Fajriadi, Dede Farhan Nurul Imam Farhan Nurul Imam Fatimah, Siti Fitri Rahmawati Fitri, Azela Fitria Maghfiroh, Fitria Fuji Azzumar Gida Kadarisma Gita Safitri Gunawan, Sanie Rachma Setia Gusni Satriawati, Gusni Hamdan Sugilar Hesty Marwani Siregar Hidayat, Toni Hunaifi, Hunaifi Husain, Dayana Sabila I Made Suarsana I Made Suarsana Ika Meika Imelda Verina Inayah, Clara fadhilah Inayah, Sarah Indra Siregar Iswara, Eris J A Dahlan Jarnawi Afgani Dahlan Jarnawi Afgani Dahlan Joseph Taban Jozua Sabandar Jozua Sabandar Jozua Sabandar Jozua Sabandar Jurpri, Al Kadarisma, Gida Kadir, Kamaliyah Kartika Yulianti Khairunnisa Khairunnisa Khairunnisa Khairunnisa Kusnandi Kusnandi Kusnandi Kusnandi, Kusnandi Laelasari Laelasari, Laelasari Masitoh, Lisda Fitriana Mhmd. Habibi Muhammad Aiman Jamil Lubis Muhammad Ari Subhi Muhammad Ari Subhi Muhammad Tareq Ghifari mulyanti, Yanti Mulyanti N. Nurjanah Nelly Fitriani Ni Kadek Desi Lia Sagita Nia Gardenia Nike Astiswijaya Nur Eva Zakiah, Nur Eva Nur Hidayatullah Romadhon Nurmala Setianing Putri Oktaviani, Wulan Resti Palupi Sri Wijayanti, Palupi Sri Prabawanto, Sufiyani PRASETYAWAN, ENGGAR Purba, Santri Chintia Puspaningtyas, Nicky Dwi Putri Fitriasari, Putri Qania Agustika Siagian Rahayu, Diar Veni Rani Sugiarni Ratu Sarah Fauziah Iskandar Resy Nirawati Risma Nurul Auliya, Risma Nurul Rizki S.Pd. Rizky Rosjanuardi Rohimah, Siti Maryam Rully Charitas Indra Prahmana Rusli, Andi Zahrah Muflihah safitri, gita Sarah Inayah Septian, Ari Siagian, Qania Agustika Siti Fatimah Situmeang, Gita Meilisa Solehudin, Solehudin SRI YULIANTI Stevi Natalia, Stevi Sufyani Prabawanto, Sufyani Sugama Maskar Sugiarti, Dede Suhendra Suhendra Sumarni Sumarni Sumarni Sumarni Supriatna, Tatang Syaiful Hamzah Nasution Syaiful Syaiful Syarifuddin Syarifuddin Tatang Herman, Tatang TATI NURHAYATI Taufiqulloh Dahlan Thesa Kandaga Tia Purniati Turmudi Ulfa, Nadia Ulfah Nur Azizah VARA NINA YULIAN Wahyu Hidayat Wahyudin Wahyudin Widya Kusumaningsih Widya Kusumaningsih Yanti Mulyanti Yaya S Kusumah Yaya S. Kusumah Yaya S. Kusumah Yaya S. Kusumah Yaya S. Kusumah Yaya S. Kusumah Yullys Helsa Yuni, Yatha Yusuf Adhitya Zulkardi Zulkardi Zulkardi Zulkardi