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Tatag Yuli Eko Siswono

Department Of Mathematics Education, Universitas Negeri Surabaya, Indonesia

Author-ID : 382372

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Public Health Social Sciences Other

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Pengembangan E-Book Bangun Datar untuk Meningkatkan Kemampuan Berpikir Kritis Siswa Kelas III Sekolah Dasar Andriani, Wiwik; Siswono, Tatag Yuli Eko; Prastiti, Tri Dyah
MAJAMATH: Jurnal Matematika dan Pendidikan Matematika Vol. 6 No. 1 (2023): Vol 6 No 1 Maret 2023
Publisher : Prodi Pendidikan matematika Universitas Islam Majapahit (UNIM), Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamath.v6i1.2544

Penelitian ini bertujuan untuk menjelaskan kelayakan media e-book bangun datar dan menjelaskan apakah berpikir kritis siswa mengalami peningkatan sesudah belajar dengan media e-book bangun datar. Latar belakang diadakan penelitian ini karena tingkat berpikir kritis siswa rendah pada materi keliling bangun datar. Dalam penelitian ini menggunakan metode pengembangan model ADDIE. Analisis data yang digunakan adalah uji-t dan N-gain. Diperoleh persentase 90% dari orang yang kompeten di bidang materi, 91% dari orang yang kompeten di bidang bahasa, serta 92% dari orang yang kompeten di bidang media. Hasil uji kepraktisan dilihat dari hasil angket siswa diperoleh 92% artinya sangat praktis digunakan. Tingkat efektivitas berdasarkan posttest siswa secara individu dan klasikal mendapat nilai >71 termasuk dalam kategori tuntas, hal tersebut membuktikan media e-book bangun datar efektif digunakan. Berdasarkan hasil uji kelayakan media diketahui bahwa media e-book bangun datar layak dipakai dalam peningkatan kemampuan berpikir kritis. Hasil perhitungan menggunakan uji-t diperoleh rata-rata posttest sebesar 85,66 lebih tinggi dibandingkan nilai pretest sebesar 38,73. Hasil perhitungan menggunakan uji N-gain diketahui rata-ratanya sebesar 0,7 dalam rentang 0,3 ? g ? 0,7 dengan kriteria sedang. Berdasarkan hasil perhitungan uji-t dan N-gain bisa ditarik kesimpulan kemampuan berpikir kritis siswa meningkat secara signifikan sebelum dan sesudah menggunakan media e-book bangun datar dalam proses belajar mengajar.

Mathematical Creativity: A Systematic Review of Current Research on Eye-Tracking Technology Farman; Siswono, Tatag Yuli Eko; Lukito, Agung; Dewi, Ratna Sari; Ndayizeye, Oscar; Hali, Fitriyani
Journal of Applied Science, Engineering, Technology, and Education Vol. 7 No. 3 (2025)
Publisher : PT Mattawang Mediatama Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35877/454RI.asci4167

Recent empirical research on mathematical creativity using eye-tracking (ET) technology has faced challenges in developing comprehensive overviews due to the diversity of tools, task types, ET metrics, and identification methods. Thus, this systematic review attempts to examine studies that focus on mathematical creativity and incorporate ET technology. Guided by Newman and Gough’s seven-step approach, a Scopus database search covering publications up to 2024 identified five eligible empirical studies collected for this study. The review reveals that researchers employed two primary types of eye trackers: screen-based trackers, which are affordable and unobtrusive, and eye-tracking glasses, which enable participants to engage in paper-and-pencil tasks while moving naturally. To stimulate creative thinking, the studies utilized open-ended mathematical tasks—particularly geometry-based multiple solution tasks (MST) and visual modeling tasks—that encourage divergent exploration. In analyzing creative processes, researchers combined ET metrics such as fixation duration, fixation count, and scan paths with gaze-overlaid videos, offering complementary insights into visual attention patterns and idea development. Additionally, several studies integrated ET with stimulated recall interviews (SRI), allowing participants to reflect on their strategies and deepening the interpretation of cognitive processes. This methodological combination effectively captures both visual behaviors and participants’ reflections, highlighting the complexity of creative thinking in mathematics and offering guidance for future research and instructional practice.

Analyzing Students' Contextual Problem-Solving on the Pythagorean Theorem Based on Learning Styles Amelia Rida Zahra Hardian Hardian; Tatag Yuli Eko Siswono; Novita Vindri Harini
MATHEdunesa Vol. 15 No. 2 (2026): Jurnal Mathedunesa Volume 15 Nomor 2 Tahun 2026
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/mathedunesa.v15n2.p411-421

This study aims to explore the problem-solving processes of students in solving contextual problems related to the Pythagorean Theorem based on their learning styles. This study uses a qualitative descriptive approach involving three students representing visual, auditory, and kinesthetic learning styles. Data were collected through written tests and semi-structured interviews, and analyzed through data reduction, data display, and conclusion drawing. The results show that students demonstrate different ways of thinking in constructing problem-solving processes. Visual learners tend to use diagrams and visual representations to organize information. Auditory learners demonstrate a sequential problem-solving process through verbal reasoning and internal dialogue. Meanwhile, kinesthetic learners engage with the problem through physical and spatial imagination using movement and gestures. Although some parts of the process are expressed through different forms, such as verbal explanation or mental reflection, the findings show that students construct understanding and connect mathematical concepts with contextual situations. These results emphasize that differences in learning styles are reflected in how students think, represent, and process problems

Exploring Junior High School Students’ Critical Thinking Processes in Problem Posing on Systems of Linear Equations in Two Variables Using GeoGebra Fidyah Maulidah; Tatag Yuli Eko Siswono
Journal of the Indonesian Mathematics Education Society Vol. 4 No. 1 (2026): Journal of the Indonesian Mathematics Education Society
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jimes.v4n1.p40-52

This study aims to explore the critical thinking processes of junior high school students in posing, modifying, and validating problems involving Systems of Linear Equations in Two Variables with the support of GeoGebra. Using Ennis’s (2022) theoretical framework, the study analyzes six indicators of critical thinking: focus, reasoning, inference, contextual understanding, clarity, and overview. A qualitative descriptive case study method was employed with three eighth-grade students of varying mathematical abilities (high, medium, and low). Data were collected through a problem-posing test, observation of GeoGebra use, and semi-structured interviews. The results indicate that the high-ability student (S1) was able to appropriately modify Systems of Linear Equations in Two Variables problems with strong mathematical reasoning, supported by GeoGebra visualizations. The medium-ability student (S2) was able to change parameters but had limited understanding of the implications of those changes on the solution. Meanwhile, the low-ability student (S3) struggled to modify problems and validate solutions, even producing inconsistent systems. These findings highlight the critical role of GeoGebra in facilitating conceptual understanding of Systems of Linear Equations in Two Variables while also identifying challenges faced by students with different levels of mathematical ability. The study offers pedagogical implications for the development of technology-integrated mathematics instruction aimed at enhancing students’ critical thinking skills.

Development of A Learning Video on The Discovery of Integer Numbers to Improve Mathematical Problem-Solving Abilities and Creative Thinking Abilities of Grade VI Students Oktaf Winda Wanodya Utama; Tatag Yuli Eko Siswono; Tri Dyah Prastiti
EDUJAVARE: International Journal of Educational Research Vol. 4 No. 01 (2026): EDUJAVARE: International Journal of Educational Research
Publisher : CV. Edujavare Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70610/edujavare.1167

This study aims to develop a discovery-based mathematics learning video on integer material that can improve mathematical problem-solving skills and creative thinking skills of grade VI elementary school students. This study uses the Research and Development (R&D) method with the ADDIE development model consisting of five stages: Analysis, Design, Development, Implementation, and Evaluation. The subjects in this study were grade VI students at an elementary school in Punggul Gedangan. The instruments used included validation sheets from material experts, design experts, media experts, and mathematics teachers, student response questionnaires, and problem-solving and creative thinking ability tests. The validation results showed that the developed learning video was included in the very valid category. Limited trials showed that the video was effective in improving students' problem-solving and creative thinking abilities. Thus, the developed learning videos are suitable for use as alternative learning media in mathematics learning, especially integer material, and can support students' high-level thinking skills.

Socio-Ecological Problem Posing in Waste Context: Socio-Ecological Awareness and Mathematical Thinking of Preservice Mathematics Teachers Tina Rosyana; Tatag Yuli Eko Siswono; Abdul Haris Rosyidi; Sugi Hartono
Journal of Teaching and Learning Mathematics Vol. 4 No. 1 (2026): Journal of Teaching and Learning Mathematics (July)
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jtlm.v4i1.45163

Socio-ecological issues increasingly require mathematics education to connect mathematical learning with sustainability-related problems encountered in everyday life. In this context, problem posing provides opportunities for students to formulate mathematical problems and to interpret socio-ecological phenomena through mathematical reasoning. This study aims to examine socio-ecological problem posing in waste contexts by investigating the mathematical problems posed by preservice mathematics teachers, the manifestation of socio-ecological awareness reflected in their responses, and their mathematical thinking patterns. This study employed an interpretive qualitative approach involving six sixth-semester preservice mathematics teachers enrolled in a socio-ecological mathematics education course at a teacher education institution in Cimahi, Indonesia. Data were collected through a problem-posing worksheet designed around waste-related issues in Cimahi City and analyzed using qualitative content analysis. The findings reveal that participants generated diverse and contextual mathematical problems related to landfill capacity, waste growth, waste reduction, and community-based waste management. Socio-ecological awareness emerged through ecological awareness, social awareness, socio-ecological interconnectedness, and solution orientation. Furthermore, participants demonstrated variations in mathematical thinking, particularly in identifying quantities, establishing relationships between variables, constructing mathematical representations, and engaging in systematic reasoning. The findings suggest that socio-ecological problem posing may help preservice mathematics teachers connect mathematics with sustainability issues and provide insights into how they interpret socio-ecological problems through mathematical thinking. These findings have practical implications for school mathematics teaching by demonstrating how socio-ecological problem posing can be used to connect mathematical concepts with authentic sustainability issues. Such activities may support students in developing mathematical reasoning, systems thinking, and awareness of environmental challenges through meaningful classroom contexts.

Exploring Students’ Creative Thinking Process in Solving Triangle Problems Assisted by GeoGebra Wahyu Kartikawati; Tatag Yuli Eko Siswono
Journal of Mathematical Pedagogy (JoMP) Vol. 6 No. 1: December 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jomp.v6n1.p1-13

The study aims to describe student’s creative thinking process in solving triangle problems using GeoGebra. This qualitative approach involved six students selected from 28 students in grade 8 based on the case categories of student’s abilities namely high mathematical abilities (HMA), medium mathematical abilities (MMA), and low mathematical abilities (LMA). Data collection techniques were conducted through mathematical ability tests (MAT) to determine research subjects, creative thinking tests assisted by GeoGebra to determine students’ creative thinking processes, and interviews. The data analysis technique uses indicators of creative thinking stages according to Siswono, and data reduction from interviews to explore student’s creative thinking processes. The research results show that student’s creative thinking processes at the stages of synthesizing ideas, generating ideas, planning the implementation of ideas, and implementing ideas have different processes at each ability level. At the stage of synthesizing ideas, all students synthesize their ideas by combining the knowledge they have, both from everyday life and during classroom learning. All students were able to mention the information contained in the questions. LMA had difficulty relating the information in the questions to daily life and learning experiences in class, but HMA and MMA were able to relate it smoothly. At the idea-building stage, HMA and MMA can come up with two ideas for solutions using GeoGebra, while LMA can only come up with one idea. At the stage of planning to implement the idea, HMA and MMA had other ideas for solving the problem, but LMA only had one idea for solving it. At the stage of applying ideas, HMA and MMA can show two different answer ideas, while LMA can only show one answer idea. HMA was able to solve questions using GeoGebra smoothly, but MMA and LMA were less fluent, all subjects checked their answers again, HMA and MMA were confident in their answers, but LMA was less confident in their answers.

Collaborative Problem-Solving Skills of Heterogeneous Groups on Statistics Material Assisted by Microsoft Excel Wuri Indah Murwaningsih; Tatag Yuli Eko Siswono
Journal of Mathematical Pedagogy (JoMP) Vol. 6 No. 1: December 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jomp.v6n1.p26-36

Collaboration is an important skill in the 21st century. This qualitative research is to describe the collaborative problem-solving ability of heterogeneous groups of statistics material assisted by Microsoft Excel. This research is a case study of 2 high and low math ability VIII grade students who were paired into one group in solving statistical problems with Microsoft Excel. The instruments used were math ability tests, problem solving tests, and interviews. Data were analyzed by data reduction, data presentation, and conclusion drawing based on collaborative problem solving ability indicators. The results showed that high mathematics ability students can provide ideas in determining the solution strategy, find Microsoft Excel-assisted solutions, and help low mathematics ability students so that they dominate in the problem solving process. However, low math ability students tend to follow the ideas of high math ability students. There were discussion activities, information sharing, and task sharing in the problem solving process. Therefore, for teachers to improve collaborative solving skills, especially for low math ability students and consider all effective strategies in solving problems.

Creative Thinking Process of Prospective Teacher Students Based on Cognitive Style in Solving Contextual Problems Endang Suprapti; Tatag Yuli Eko Siswono; Manuharawati; Armeria Wijaya
Journal of Mathematical Pedagogy (JoMP) Vol. 6 No. 1: December 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jomp.v6n1.p50-59

This study aims to explore the creative thinking processes of prospective elementary school teacher students in solving contextual mathematical problems based on their cognitive styles. Using a qualitative descriptive approach, two students were selected through purposive sampling: one with a field independent (FI) cognitive style and high self-efficacy, and the other with a field dependent (FD) cognitive style and low self-efficacy. Data were collected through task-based tests and in-depth interviews, then validated and analyzed based on the stages of creative thinking: synthesizing ideas, building ideas, planning the implementation of ideas, and implementing the ideas. The results revealed notable differences in the creative thinking processes of the two subjects. The FI student exhibited fluency, flexibility, and novelty by generating multiple correct solutions through diverse strategies. In contrast, the FD student faced challenges in synthesizing ideas, relying on a single strategy, and producing only one correct solution. These findings highlight the significant impact of cognitive style on creative mathematical thinking and underscore the importance of tailored instructional approaches to support diverse cognitive profiles.

Enhancing Students’ Computational Thinking Skills through Digital Ethnomathematics Learning with ECOPEDIA Halimah Nur Agustin; Neni Mariana; Tatag Yuli Eko Siswono
Journal of Learning Improvement and Lesson Study Vol. 6 No. 1 (2026): JLILS (June Edition)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jlils.v6i1.219

This study investigated the improvement of students’ computational thinking abilities through the implementation of digital ethnomathematics instruction supported by the ECOPEDIA platform. A quantitative methodology was adopted, employing a quasi-experimental pretest-posttest control group design. The research involved two class groups, namely an experimental cohort and a comparison cohort. The primary data collection tool was a computational thinking assessment, which had undergone validity and reliability testing prior to use. Based on the analysis, the experimental group’s mean score rose from 50.7 at pretest to 84.8 at posttest. The Independent Sample T-Test revealed a statistically meaningful difference between the two groups (p < 0.05). Furthermore, the experimental class achieved an N-Gain of 0.69, falling into the moderate category and surpassing that of the control class. In light of these results, the ECOPEDIA-based digital ethnomathematics approach proved to be more effective than conventional teaching methods in this particular sample (Cohen’s d = 0.82, indicating a large effect size). These outcomes suggest that culturally grounded digital media can serve as a promising instructional alternative for fostering 21st-century competencies, although further studies with broader sampling are recommended to confirm the generalizability of these findings

Co-Authors ABADI Abadi Abadi Abadi Abadi Abdul Haris Rosyidi Abdul Haris Rosyidi ADINDA SURYA PUTRI, NOVIEA AGUNG LUKITO Agung Lukito Ahmad Wachidul Kohar Ain Putri Rustini Ainurrohmah, Indah Ajeng Rara Veronica Alfiati Oktaaviarina Alista Hariyanti Amalina, Ijtihadi Kamilia Amalina, Ijtihadi Kamilia Amelia Rida Zahra Hardian Hardian Aminah Ekawati Amirudin, Mochammad Amirudin, Mochammad Aneu Pebrianti Anis Shobikhah Aniskurnia Rahmadhani Fajerin Annisa Shafa Az Zahra Ardi Dwi Susandi Ardiansyah, Dicky Ari Mawanto Arief Budi Wicaksono Armeria Wijaya Aryo Andri Nugroho Asma Johan Atik Wintarti Aulia Kholifatul Khasanah Auliya, Ahmad Sulthan AYU SEPTYANI, DWI Ayu Wulandari, Hilaria Yesieka Bahrudin, Eko Rahmad Bonyah, Ebenezer Cahyati, Vania Idelia Ching, Ong Khye Chusnul Fadlilah Defi Imamatus Sholikha Deka Anjariyah Devya, Lenthera Mega Dewi Setianingsih Dini Kinati Fardah Dita, Farah Dovina Meilisa Nur Fadilla Dwi Juniati Dwi Juniati Dwi Juniati Dwi Nur Yunianti DWI SISWANTORO, MAHMUD Ekawati , Rooselyna Elita Nathania Dewi Elvita Novia Dinawati Ely Susanti Endah Budi Rahaju Endang Suprapti Endri Puji Lestari Evangelista Lus Windyana Palupi Evy Novia Nanda Artama Fachry Abda El Rahman FARIHATUS SADIYAH, IHDA Farman FATIMA AZZAHRO, ELOK Fatimatul Khikmiyah Fatimatul Khikmiyah Fauzi, Habibillah Achmad Putra Fiangga, Shofan Fidyah Maulidah FILLAH FR, ASHDAQ Fitmawati, Entya Esa FITRIYAH, NUR Fitriyani Hali, Fitriyani Fran Susanto Galih Kurniadi Galih Kurniadi Gusti Uripno HABIB MANAN, MUHAMMAD Halimah Nur Agustin Hanifah, Mifthaqul Harini, Novita Vindri Heng, Limalin Hikmah, Nur Hidayatul I Ketut Budayasa Ida Dwijayanti Ihsani, Ulynnuha Aulia Ijtihadi Kamilia Amalina Ika Dwi Retnowati Ika Kurniasari Ika Kurniasari Imelda Imelda Imelda Imelda Imelda Imelda Indarasati, Nanda Ayu Ismail Ismail Ismail Ismail, Ismail Iyan Rosita Dewi Nur Jamhari Jamhari Jayanti Putri Purwaningrum Julia Ayu Wulandari Kai-Lin Yang Karomah, Syarifatul Kharisma Normala Dewi Khoirun Nisa khusnul khotimah kiki ratnaning arimbi Kurnia Widyaningsih Kurniawan Cahyanto Laikha Sari Lenthera Mega Devya M. Fauzan Asy'ari M. Ulul Albab M. Zaenal Muttaqin MACHMUDAH, AMIROTUL Manuharawati Marpaung, Dian Wahyu Masriyah Masriyah MASRIYAH Masriyah Masriyah Masriyah Masriyah Masriyah Masriyah Masriyah Masriyah Maulida Aulia Mega Teguh Budiarto Meryansumayeka Meryansumayeka Mochammad Amirudin Moh. Hafiyusholeh Mudinillah, Adam Muh. Rizal Muhamad Alfian Efendi Muhammad Arif Fathoni Muhtarom muhtarom Muhtarom Muhtarom Murwaningsih, Wuri Indah Mustika Maharani Jarkoni Nabilah Kartika Sukmawati Nabilla Dihni Amilia Nanda Ayu Indarasati Nanik Kurnia Sugiarti Ndayizeye, Oscar Neni Mariana Noerdiana, Azizah Firdha Novita Vindri Harini Nuha Zamroni, Fajar Nur Azizah Nurdin Nurdin Nurul Laili Nuswantoro, Ari Wahyudi Nyimas Aisyah Oktaf Winda Wanodya Utama Oktaviana Ainun Ratnawati Oktaviana Ainun Ratnawati Oktaviana, Dwi Livia Pertiwi, Rizky Dian Pradnyo Wijayanti Putra, Misel Rajasyah Hadi Putri Dwi Naryaningsih Rachma Mufidah, Latifah Nuryah Raden Sulaiman Rahaju, Endah Budi Rahman, Fatchiyah Rahmatika, Ismi Ramlah Ramlah Ramlah Ramlah Ramlah Ratna Sari Dewi Restu Ria Wantika Ria Pusvita Sari Rini Setianingsih Rini Subiyati Rita Diana Rita Lefrida Rodiyah Putri Aryffiani, Lisa`yiha Rooselyna Ekawati ROYHAN, MUHAMMAD Rusydah Kamilah Salsabila Az Zahra SANDI SETIAWAN, ARI Savirra Tazkia Sendi Ramdhani Setia Putri Ayu Ramadani Setianingsih, Rini Sipayung, Tetty Natalia Siti Khabibah Siti Khoiriyah Siti Maghfirotun Amin Siti Mistima Maat Siti Munawaroh Sri Wahyuni Sugi Hartono Sugi Hartono Sugi Hartono, Sugi Suhendra Panca Wardhana Susanto, Fran Sutinah Syafiul Muzid SYAMSU ALAM Syamsu Alam Syarifatul Maf’ulah Syifa'uliyah, Syifa’uliyah Syifa’uliyah Syifa'uliyah tazkia, savirra Tina Rosyana Tri Dyah Prastiti Tri Rezeki, Irma Setiawati Tria Bitara Ucu Rahayu Ulul Azmi Uswatun Hasanah Uzlifatul Hasanah Uzlifatul Hasanah Vania Idelia Cahyati Wahyu Kartikawati Wahyuni, Anik Sri Wiryanto Wiryanto Wiryanto Wiryanto Wiryanto Wiryanto Wiryanto Wisnu Diansyah, Zamzami Wiwik Andriani Wiwik Andriani Wulan Puspitasari Wulandari, Hilaria Yesieka Ayu Wuri Indah Murwaningsih Yatim Riyanto Yulia Puji Astuti Yumiati YUSUF FUAD Zahri, Mohammad Zulnaidi, Hutkemri

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