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All Journal Jurnal Pendidikan Matematika dan IPA Jurnal Infinity Indonesian Journal of Mathematics and Natural Sciences Kreano, Jurnal Matematika Kreatif-Inovatif Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Jurnal Elemen JURNAL PROFESI KEGURUAN Al-Jabar : Jurnal Pendidikan Matematika Math Didactic: Jurnal Pendidikan Matematika HISTOGRAM: Jurnal Pendidikan Matematika Union: Jurnal Ilmiah Pendidikan Matematika JRPM (Jurnal Review Pembelajaran Matematika) MUST: Journal of Mathematics Education, Science and Technology Journal of Honai Math MATEMATIKA DAN PEMBELAJARAN SJME (Supremum Journal of Mathematics Education) Jurnal Cendekia : Jurnal Pendidikan Matematika Prima: Jurnal Pendidikan Matematika Journal on Education Unnes Journal of Mathematics Education Research Journal of Primary Education Symmetry: Pasundan Journal of Research in Mathematics Learning and Education MEJ (Mathematics Education Journal) ANARGYA: Jurnal Ilmiah Pendidikan Matematika JIKAP PGSD: Jurnal Ilmiah Ilmu Kependidikan M A T H L I N E : Jurnal Matematika dan Pendidikan Matematika JPMI (Jurnal Pembelajaran Matematika Inovatif) Jurnal Penelitian Pembelajaran Matematika Sekolah JP2M (Jurnal Pendidikan dan Pembelajaran Matematika) Hipotenusa : Journal of Mathematical Society Range : Jurnal Pendidikan Matematika Jurnal Wahana Pendidikan Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika SUPERMAT (JURNAL PENDIDIKAN MATEMATIKA) Jurnal Math-UMB.EDU Jurnal Riset dan Inovasi Pembelajaran Plusminus: Jurnal Pendidikan Matematika SCIENCE : Jurnal Inovasi Pendidikan Matematika dan IPA Kognitif: Jurnal Riset HOTS Pendidikan Matematika Journal Evaluation in Education (JEE) Unnes Journal of Mathematics Education Unnes Journal of Mathematics Edukasia: Jurnal Pendidikan dan Pembelajaran Jurnal Ilmiah Ilmu Terapan Universitas Jambi Prima Magistra: Jurnal Ilmiah Kependidikan Jurnal Pendidikan Indonesia (Japendi) Journal of Mathematics Learning Innovation (JMLI) Bookchapter Pendidikan Universitas Negeri Semarang Prosiding Seminar Nasional Pascasarjana Proceeding of International Conference on Science, Education, and Technology JNPM (Jurnal Nasional Pendidikan Matematika) Jurnal Pengembangan Pembelajaran Matematika Kreano, Jurnal Matematika Kreatif Inovatif Unnes Journal of Mathematics Education Hipotenusa: Journal of Mathematical Society Jurnal Infinity Jurnal Pendidikan Progresif Journal on Mathematics Education Journal of Computer Science and Technology Application SJME (Supremum Journal of Mathematics Education) Mathema: Jurnal Pendidikan Matematika
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Comparative impacts of project-based learning and other strategies on creative thinking in STEAM education: A systematic literature review Abdika, Ahmad Ijlal; Agoestanto, Arief; Mariani, Scolastika; Sugiman, Sugiman
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 2 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i2.19600

Abstract

Creative thinking is the ability to generate and develop new ideas. It is considered a high-level thinking skill that plays a crucial role in the 21st century. According to the 2022 PISA results, the creative thinking skills of Indonesian students are categorized as low. The Project-Based Learning (PjBL) model, when integrated with the STEAM approach, offers a promising strategy to enhance creative thinking. This study aims to provide an overview of how various teaching strategies—particularly PjBL—compare to other approaches in fostering creative thinking through the STEAM framework, using a Systematic Literature Review. Following the PRISMA protocol, nine relevant articles were identified that addressed the research questions. The findings indicate that the PjBL-STEAM approach has a significantly more positive, profound, and sustainable impact on improving creative thinking skills across all educational levels compared to other pedagogical strategies. PjBL fosters creativity not only as an academic skill but also as a life competency, integrated with 21st-century social, emotional, and problem-solving abilities. This study offers direction for future research in evaluating effective learning models to enhance creative thinking.
Integrating technology, Javanese ethnomathematics, and realistic mathematics education in supporting prospective mathematics teachers' numeracy skills: A learning trajectory Nursyahidah, Farida; Wardono; Mariani, Scolastika; Wijayanti, Kristina
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.pp671-688

Abstract

In the era of the 21st century and Industrial Revolution 4.0, prospective mathematics teachers (PMTs) are expected not only to possess strong mathematical content knowledge but also to develop pedagogical approaches that promote students’ numeracy skills in meaningful and contextually relevant ways. However, despite growing global attention to numeracy, there remains a gap in instructional models that effectively integrate local cultural contexts and technological tools in the preparation of PMTs. Addressing this gap, this study introduces a novel learning trajectory that embeds technology, Javanese ethnomathematics, and Realistic Mathematics Education into a coherent instructional design framework, namely TE-RME aimed at enhancing PMTs' numeracy competencies. The research employed a design research methodology encompassing three iterative stages: preliminary design, design experiments consisting of a pilot and teaching experiment, and retrospective analysis. The participants were 25 fifth-semester PMTs enrolled at a private university in Semarang, Indonesia. The resulting trajectory comprises five learning activities, such as orientation to cultural contexts, exploration and problem-solving of numeracy tasks, task design involving numeracy elements, communication and interpretation of mathematical solutions, and instructional design involving the integration of numeracy tasks. Findings revealed that the TE-RME approach effectively supported PMTs in making meaningful connections between culturally embedded practices and everyday mathematical reasoning. By engaging with authentic local contexts, students demonstrated increased fluency in solving numeracy problems and designing contextually relevant learning activities. This research contributes a culturally responsive instructional model for mathematics teacher education and underscores the pedagogical potential of integrating local wisdom with contemporary mathematics education approaches. Implications point to further research exploring other ethnomathematical contexts to enrich mathematics instruction and promote equitable and culturally grounded mathematics learning.
Meta-Analysis: The Effect of Mathematical Resilience to Mathematical Problem Solving Ability Tania, Nova; Mariani, Scolastika; Agoestanto, Arief; Susilo, Bambang Eko
SJME (Supremum Journal of Mathematics Education) Vol 8 No 1 (2024): Supremum Journal of Mahematics Education
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Singaperbangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/sjme.v8i1.10481

Abstract

The aim of this research is to analyze the effect of mathematical resilience to mathematical problem solving abilities based on relevant articles. This research method uses meta analysis using OLS (Ordinary Least Square) to determine a simple linear regression equation and also using formula effect size to determine the measure of effect. The results of this research are that mathematical resilience has a positive effect to mathematical problem solving abilities of 44.488% with a simple linear regression equation, namely . The effect of mathematical resilience to mathematical problem solving ability is large, with average of effect size is 0.764. So, its conclude that mathematical resilience had positive large effect to mathematical problem solving ability.
Meta Analysis: The Effect of Treffinger Learning Model on Students' Mathematical Creative Thinking Ability Wahyuningsih, Vebryana; Isnarto, Isnarto; Hendikawati, Putriaji; Mariani, Scolastika; Rosyida, Isnaini
SJME (Supremum Journal of Mathematics Education) Vol 9 No 1 (2025): Supremum Journal of Mahematics Education
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Singaperbangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/sjme.v9i1.94

Abstract

This study aims to determine the effect of Treffinger learning model on students' mathematical creative thinking ability, based on previous research articles. The method used in this research is meta-analysis. The results of the analysis through the calculation of the t-test and effect size show that , indicating that the average mathematical creative thinking ability of students who use the Treffinger model is higher than the average students who follow conventional learning. Thus, there is a significant influence between the mathematical creative thinking ability of students using the Treffinger model, with an effect size of 1.02, which is classified in the large category.
Beyond Straight Lines: Contextualizing Lobachevsky's Parallel Postulate Through the Geometry of the "Bubu" Fishing Gear Anggoro, Abdurrobbil Falaq Dwi; Wardono, Wardono; Mariani, Scolastika; Susilo, Bambang Eko
Journal of Honai Math Vol. 8 No. 3 (2025): Journal of Honai Math
Publisher : Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jhm.v8i3.974

Abstract

The axiom of Lobachevsky's parallelism is one of the topics that students often find difficult. The purpose of this research is to design a learning trajectory about the Lobachevsky axiom of parallelism using the context of a valid, practical and effective traditional fishing gear "bubu". This research applies development studies which consist of three main phases: preliminary study: analysis and exploration; prototype development: design and construction; and the last stage of assessment: evaluation and reflection. The results of the study show that the learning trajectory of the Lobachevsky equation axiom using the context of traditional fishing gear "bubu" is valid, practical and effective to improve problem-solving skills for mathematics education students. The conclusion is that there are six steps to the learning trajectory, namely: First, identification of problems with the local cultural context; Second: representation of problems; Third: make a settlement plan; Fourth: implementing the plan; Fifth: evaluate the solution of the problem; and lastly, make a conclusion about the axiom of Lobachevsky's parallelism.
Assessing the Competence of Prospective Mathematics Teachers in Technology-Enhanced Differentiated Instruction for Inductive Learning Wulandari, Enika; YL Sukestiyarno; Scolastika Mariani; Masrukan
Hipotenusa: Journal of Mathematical Society Vol. 7 No. 2 (2025): Hipotenusa: Journal of Mathematical Society
Publisher : Program Studi Tadris Matematika Universitas Islam Negeri (UIN) Salatiga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18326/hipotenusa.v7i2.5477

Abstract

The demands of 21st-century pedagogical competencies necessitate that Prospective Mathematics Teachers (PMTs) be proficient in the integrated application of technology and differentiation. This study aims to assess the competence of PMTs in implementing technology-enhanced differentiated instruction within an inductive learning framework, evaluated through seven key elements referencing the frameworks of Prince & Felder and Tomlinson. Utilizing a descriptive qualitative approach, this study analyzed in-depth peer teaching video recordings from the entire cohort of 15 students in a mathematics education program. The novelty of this research lies in its focus on the integrated operationalization of these three complex pedagogical elements. Data analysis was conducted rigorously using the interactive model of Miles, Huberman, and Saldana, supported by source triangulation to ensure the credibility of the findings. The results indicate that PMTs achieved high competence in inductive learning and differentiation (implemented by 93%–100% of PMTs). However, the implementation of technology-enhanced learning showed significant variance, being adequately achieved by only 67% of PMTs. It is concluded that while PMT training is robust in instructional design and differentiation strategies, the integration of technological tools requires further optimization and focused development to meet the demands of 21st-century skills.
SELF-REGULATED LEARNING AND COMPUTATIONAL THINKING: ANALYZING THE PERFORMANCE OF JUNIOR HIGH SCHOOL STUDENTS ON PISA-LIKE PROBLEMS Pramesti, Santika Lya Diah; Dewi , Heni Lilia; Mariani, Scolastika; Amrina, Dava
MATEMATIKA DAN PEMBELAJARAN Vol. 13 No. 2 (2025): MATEMATIKA DAN PEMBELAJARAN
Publisher : IAIN Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33477/mp.v13i2.11343

Abstract

This study investigates the relationship between self-regulated learning (SRL) and computational thinking (CT) in solving PISA-like mathematics problems among junior high school students. Using a qualitative descriptive design, data were collected from 33 ninth-grade students through SRL questionnaires, PISA-like problem-solving tasks, think-aloud protocols, and semi-structured interviews. Students were categorized into three SRL levels: high (12.12%), medium (72.73%), and low (15.15%), with two students from each level selected for in-depth analysis. The analysis focused on four CT indicators: decomposition, pattern recognition, abstraction, and algorithmic thinking. Results showed that students with high SRL demonstrated strong CT performance across all indicators, especially in abstraction and algorithmic thinking. Medium-SRL students showed moderate CT ability, though with inconsistencies in strategy and reasoning. Students with low SRL exhibited weak CT skills and lacked systematic problem-solving approaches. These findings highlight the significant role of SRL in supporting students' ability to apply CT in complex mathematical contexts. Future studies may explore digital SRL scaffolding tools to enhance CT development across diverse mathematical domains.
HOW IS THE DYNAMIC THINKING PROCESS OF PROFICIENT’ STUDENTS IN SOLVING TRANSFORMATION GEOMETRY PROBLEMS? Pamungkas, Megita Dwi; Waluya, Stevanus Budi; Mariani, Scolastika; Isnarto, Isnarto
Jurnal Ilmiah Ilmu Terapan Universitas Jambi Vol. 9 No. 1 (2025): Volume 9, Nomor 1, March 2025
Publisher : LPPM Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jiituj.v9i1.36804

Abstract

Dynamic thinking is a crucial cognitive skill that enables students to solve complex problems in geometry effectively. This study investigates the characteristics of dynamic thinking among prospective mathematics teachers, focusing on the four key aspects: technique, conceptualization, monitoring, and perception. While previous research has identified these aspects, the specific problem-solving characteristics of dynamic thinking in mathematical contexts remain unexplored. This qualitative study was conducted at Tidar University, involving 54 prospective mathematics teachers identified as dynamic thinkers. Data were collected through a two-stage problem-solving test, structured observations, and in-depth interviews. The research instruments underwent a validation process to ensure reliability. Data analysis followed a systematic approach involving reduction, presentation, and verification to extract patterns of dynamic thinking among proficient problem solvers. The results indicate that students who exhibit proficient dynamic thinking demonstrate completeness and consistency in all four aspects. They effectively integrate multiple strategies, adapt their approaches in response to challenges, and maintain a reflective understanding of their problem-solving processes. Additionally, proficient dynamic thinkers show a higher degree of flexibility and spatial reasoning in geometry problems. This study contributes to the existing body of knowledge by identifying and describing the specific characteristics of dynamic thinking in mathematical problem-solving. The findings provide valuable insights for teacher education programs, emphasizing the need to cultivate dynamic thinking skills among prospective math educators. Future research can explore dynamic thinking across different mathematical domains and cognitive frameworks.
Meta-Synthesis: Mathematical Problem-Solving Ability Reviewed from Students’ Self-Efficacy Erina Nurhalisha; Zaenuri Zaenuri; Kristina Wijayanti; Scolastika Mariani; Isnaini Rosyida
MATHEMA: JURNAL PENDIDIKAN MATEMATIKA Vol. 7 No. 2 (2025): MATHEMA
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jm.v7i2.82

Abstract

Mathematical problem-solving ability is essential for individuals who study mathematics. Low mathematical problem-solving ability will result in low-quality human resources. The cause of low mathematical problem-solving ability is the lack of intensity of students doing exercises to work on mathematical problems. Mathematical problem-solving ability is closely related to students' self-efficacy. This study describes self-efficacy toward mathematical problem-solving ability, especially in mathematics learning. The method used in this study is meta-synthesis in the form of a qualitative systematic study, namely by analyzing four articles relevant to the study's title. The initial steps taken are (1) determining the questions to be studied, (2) looking for articles related to self-efficacy and mathematical problem-solving ability with a period of 2019-2024, (3) screening and selecting appropriate research articles, (4) Conducting analysis and synthesis of qualitative findings, (5) implementing quality control, and (6) concluding the final results. The analysis results concluded that self-efficacy affects students' mathematical problem-solving ability. The higher the self-efficacy, the better the ability to build mathematical knowledge through problem-solving (what is known and what is asked), the ability to solve problems that arise in mathematics and other contexts, the ability to apply and use various appropriate strategies to solve problems, and the ability to observe and reflect on the process of solving mathematical problems.
Meta Analysis The Effect of Challenge Based Learning on Mathematics Thinking Ability Alfauzan Ridho Zulfikri; Ardhi Prabowo; Scolastika Mariani; Isnaini Rosyida
MATHEMA: JURNAL PENDIDIKAN MATEMATIKA Vol. 8 No. 1 (2026): MATHEMA
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jm.v8i1.973

Abstract

This research aims to analyse the effect of implementing the Challenge Based Learning (CBL) model on students' mathematics thinking ability through a meta-analysis approach. Although mathematics plays an important role in developing students' mathematics thinking ability, international studies such as PISA show that mathematical skills in Indonesia are low. One strategy to improve these skills is through innovative learning models, one of which is CBL. CBL combines problem-based learning, project-based learning, and real-life contexts to solve relevant challenges. Based on a literature review, the application of CBL has been proven effective in improving mathematics thinking abilily such as creative thinking, critical thinking, mathematical reasoning, and numeracy literacy. Meta-analysis combines data from relevant studies by calculating the effect size to evaluate the impact. The results of the analysis show that the CBL model has a very high influence on students' mathematics thinking ability, with an average effect size of 4.028, which is classified as very high. The t-test also confirmed that there was a significant difference between the pretest and posttest scores (tcount = 35.05 > ttable = 19.97), confirming that CBL had an effect on improving mathematical thinking skills. Based on these findings, the CBL model is recommended as a learning model to improve mathematical thinking skills in mathematics education.
Co-Authors 'Ulya, Rosyidatul Abd. Rasyid Syamsuri Abdika, Ahmad Ijlal Abduh, M. Faisal Achmad Nurhadi Adi Nur Cahyono Adrillian, Hendrisa Agus Yulianto Ahmad Faridh Ricky Fahmy Ahmad Gufron Aida Istiqomah Akbar Dakha Prabowo Al Ashari, Shoib Rizal Alfauzan Ridho Zulfikri Amin Suyitno Amin, Ihdi Amrina, Dava Anggoro, Abdurrobbil Falaq Dwi Annisa Salma Zakiyyah Ardhi Prabowo Arief Agoestanto Asani, Fityan Asih, Tri Sri Noor Asna, Alivia Nur Astuti, Raras Setya Astuti, Sri Ady Aulia Hurul Aini Aziiza Andanawarih Utoyo Azizia, Ananda Jullailatul Azzahra, Tsania Rahma Bambang Eko Susilo Bambang Eko Susilo Bambang Eko Susilo Bayu Murti Suryonegoro Bayujaga, Dian Budi Waluya Budi Waluya, Stevanus Cahya, Nabella Dwi Cholifah, Cholifah Damaryanti, Desi Dwi Daroinis Sa’adah Dedeh Kurniasih Dewi , Heni Lilia Dewi, Heni Lilia Dewi, Nuriana Rachmani Dr. Masrukan, Dr. Dwi Erna Novianti Dwijanto Dwijanto Dwijanto Dwijanto Dwijanto Dwijanto Dwijanto Dwijanto, Dwijanto Dwijayanto Dwijayanto E. Sulastri Edy Soedjoko EKA ANJARWATI Emi Pujiastuti Endang Retno Winarti Endang Setyowati Endramawati, Tyas Ayun Enika Wulandari Erik Santoso Erina Nurhalisha ernita, ernita Farida Nursyahidah Fathonah, Ika Ariwanti Fauziah, Isyatul Fifqi Inayah Fitrianti, Dwi Agung Habaib, Taufik Nur Handayani, Kristina Haqiqi, Muhamad Irwan Hardi Suyitno Hasriani Ishak Hening Windria Hidayatun Nafiah, Hidayatun Hikmasari, Prihatina Ihdi Amin Ika Fitriani Fitriani Ikhsan, Ramiro Santiago Imanuel, Imanuel Indriani, Mikke Novia Iqbal Kharisudin Isnaini Rosyida Isnaini Rosyida Isnaini Rosyida, Isnaini Isnarto Isnarto Isnarto Isnarto Isnarto, Isnarto Isnarto, Isnarto Isti Hidayah Istiqomah Ambarwati Iwan junaedi Iwan Junaedi Iwan Junaedi Iwan Junaedi Jahfaludin, Abi Jannah, Anita Nur Jatnika, Sugih Nugraha Junaedi , Iwan Kartono , Khasmarawati, Vinda Khoirunnisa, Farah Dina Khunaeni, Sirilivia Kristina Wijayanti Kristina Wijayanti Kurniati, Chrisvonela Neri Lathifatun Ni'mah Lathifatun Ni'mah Liadiani, Anifa Mirza Lutfiani, Nurul M. Taufik Qurohman Ma'unah, Siti Malik, Ibnu Malik, Ibnu Marissa, Erlinda Isulis Marthinus Yohanes Ruamba Mashuri Mashuri Masrukan Masrukan Masrukan Masrukan Masturina Hamid, Ellya Maulana, Mukhamad Riziq Megita Dwi Pamungkas Megita Dwi Pamungkas Meilon, Beny Misa’adah, Fedriana Moh. Asikin Mohammad Asikin Muhammad Kharis Muhammad Marzuqi Mujiasih Mujiasih Mulyono Mulyono Mulyono Mulyono Musaidah, Evadatul Muwahiddah, Ulil Nila Ubaidah Nino Adhi, Nuriana Rachmani Dewi Nofiyah, Noni Noriza Munahefi, Detalia Noverianto, Bebyd Nugroho, Samuel Defri Nur Hidayati Nurariva Siregar Nurhalisha, Erina Nuriana Rachmani Dewi (Nino Adhi) Nurintya, Fairuz Hanan Nurmutia, Halida Eka Nursasongko, Aditya Nuzul Putri Rahmawati Onwardono Rit Riyanto Pamungkas, Megita Dwi Pradina, Putri Dwi Pramesti, Santika Lya Diah Pramesti Pranawestu, Aditya Pratiwi, Yuninda Diah Priscilia, Priscilia Monica Praneswari Putri, Dwi Liana Wella Putriaji Hendikawati Rachmani Dewi, Nuriana Raden Mohamad Herdian Bhakti Rahayu, Yenrika Kurniati Rahayuningsih, Rista Tri Ramadhani, Istika Ratri Ratnasari, Dwi Indah Rezky Bagus Pambudiarso, Rezky Bagus Riki Afiyanto Pratama Riyan Hidayat Riza Arifudin Roby Sugiarto, Dede Retno Rochmad - Rochmad Rochmad Rochmad Rochmad Rosyidatul 'Ulya S. B. Waluya, S. B. Sa'adah, Daroinis Saiful Marom Saiful Marom Santika Lya Diah Pramesti Saputri, Mike Sari, Fenny Tunjung Sari, Ratna Novita Savitri, Sukma Nur Sebastianus Fedi Setyaningsih, Lusianna Sri Solihah St. Budi Waluya Stevanus Budi Waluya Sudarsono Sudarsono Sugiman Sugiman Sugiman Sukestiyarno Sukestiyarno Sulandari, Dewi Sumliyah, Sumliyah Sunarmi Sunarmi Sunarti Susanti Susanti Tan Hian Nio Tania, Nova Tommy Tanu Wijaya Utoyo, Aziiza Andanawarih Vera Dewi Susanti Wahyu Ning Dewi Kumalaretna Wahyu Nur Annisa Wahyuningsih, Vebryana Walid Walid Walid, Walid Wardono Wardono Wardono Wardono Wardono Widiastuti, Ririn Wijaya, Teguh Ananta Winayus, Riyan Fikri Windarti, Desti Hana Wulandari, Enika YL Sukestiyarno YL Sukestiyarno YL. Sukestiyarno Yoni Sunaryo Yuni Frazwanti Yuningsih Yuningsih Zaenuri Mastur Zaenuri Zaenuri Zulfa Dayyinati Fa'izulloh