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Krida Singgih Kuncoro
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Union: Jurnal Ilmiah Pendidikan Matematika
Published by Universitas Sarjanawiyata Tamansiswa
ISSN : 2339224X     EISSN : 25793209     DOI : https://doi.org/10.30738/union
Core Subject : Education,
Education Mathematics
Union: Jurnal Ilmiah Pendidikan Matematika is a peer-reviewed open access journal published three times in a year (March, July, and November). Union: Jurnal Ilmiah Pendidikan Matematika provides a forum for lecturers, academicians, researchers, practitioners, and students to deliver and share knowledge in the form of empirical and theoretical research articles. The scope of Union is Mathematics Education which includes, but is not limited to the following topics: Mathematics Ability, Mathematics Learning Model, Mathematics Learning Media, Curriculum Development, Assessment and Evaluation, Didactical Design Research (DDR), Realistic Mathematics Education (RME), Ethnomathematics, Research and Development (RnD), PISA Task.
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Articles 40 Documents
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Search results for , issue "Vol 13 No 1 (2025)" : 40 Documents clear
Development of teaching materials for trigonometric function graphs based on ICT and Tri-N for face-to-face and distance learning Hera, Cicilia Jaga; Arcana, I Nyoman; Kusumaningrum, Betty; Sulaimon, Jamiu Temitope
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 1 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i1.17079

Abstract

The objectives of this research are to produce Tri-N and ICT-based teaching materials suitable for Face-to-Face Learning (FFL), create ICT and Tri-N-based teaching materials tailored for Distance Learning (DL), and evaluate the effectiveness and applicability of these materials across FFL and DL settings. The study contributes to academic discourse by demonstrating the efficacy of Tri-N and ICT-based teaching materials in enhancing mathematics instruction, particularly in the topic of Trigonometric Function Graphs. Using the ADDIE paradigm, which includes the phases of Analysis, Design, Development, Implementation, and Evaluation, the study employs the Research and Development (R&D) approach. The participants of the study consist of 36 Class X MIPA-2 students engaged in FFL and 36 Class X MIPA-1 students participating in DL at SMA Negeri 5 Yogyakarta. Learning outcomes evaluations, validation questionnaires, and answer questionnaires are some of the data collection techniques. To guarantee thorough review, the analysis combines qualitative and quantitative methodologies. The study's outcomes include the development of ICT and Tri-N-based teaching materials, such as learning videos, PowerPoint presentations, and handouts, with a primary focus on Trigonometric Function Graphs. These materials are made accessible through YouTube, with the link provided for broader dissemination. Expert assessments indicate high validity of the teaching materials, and student responses reflect positive reception and favorable average scores. The findings underscore the potential of these materials to enhance mathematics instruction in high school settings. It is recommended that educators integrate these resources into their teaching practices. Future research should investigate the application of ICT and Tri-N-based teaching materials across a broader range of subjects to further expand their impact on educational practices.
the Pengaruh alat peraga mesin pembagian berbasis Realistic Mathematic Education (RME) terhadap pemahaman konsep siswa pada materi operasi pembagian di kelas VII SMP Yayasan Perguruan IRA Tarigan, Adelia Br; Sibarani, Mikhael Agus Tua; Silvina, Nur; Tarigan, Putri Br; Tampubolon, Rafael; Simbolon, Stevania Sri Debbye Br; Siregar, Budi Halomoan
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 1 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i1.18524

Abstract

The problem found is the low understanding of concepts on division operation material. This is due to the difficulty of understanding the abstract material. This is triggered by the lack of utilization of relevant learning media to overcome it. This study examines the effect of RME-based division machine props on the conceptual understanding of division among seventh-grade students at SMP Yayasan Perguruan IRA. This research design uses a pre-test and post-test control group as part of a quasi-experimental research method with a quantitative approach. The population of this study was all seventh-grade students, with a sample of 18 students in the control class and 18 in the experimental class. In the post-test, the control and experimental classes obtained sig <0.05, so it was stated that there was a significant difference between the experimental class and the control class. Thus, the study results showed a substantial effect in applying Realistic Mathematic Education (RME)-based division machine props on understanding the concept of division operations in class VII of SMP Yayasan Perguruan IRA. The findings highlight the practical effect of RME-based teaching aids in improving students' conceptual understanding and emphasize the need for scalable, inclusive teaching aids in mathematics education.
Curiosity and digital communication of mildly autistic students with realistic mathematic learning approach using the Quizizz Nuraida, Elis Muslimah; Santri, Diah Dwi; Wulandari, Chintia Putri; Marini, Riri
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 1 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i1.18531

Abstract

Communication is a key factor in the exchange of emotions and information during interactions. In fact, in schools, most children with disabilities, such as autism, experience significant verbal communication difficulties. Only about 45% of students with autism can communicate verbally, while 55% still rely on nonverbal communication or assistance. Additionally, students with autism have limitations in expressing their emotions, making them highly prone to tantrums. This is one of the reasons why teachers in schools often hesitate to provide digital media to students with autism. Digital communication is also a form of communication skills, but it is based on Information and Communication Technology (ICT) to facilitate relationships and interactions with others. This study aims to explore how the curiosity and digital communication skills of students with autism can be enhanced through a realistic mathematics learning approach using Quizizz. This research employs a descriptive qualitative method, utilizing data collection techniques such as interviews, observations, and documentation. The findings, based on observational instruments conducted over three sessions, indicate that students' digital communication skills improved in each session, increasing from 44% to over 80%. Furthermore, the use of Quizizz also contributed to enhancing the verbal communication skills of students with autism. Through Quizizz, students with autism were able to practice self-expression, select answers, and even interact with their peers in game mode. This research provides valuable insights into how students with moderate autism respond to realistic and interactive mathematics learning while helping educators better understand their special needs and develop more effective teaching strategies.
Pertimbangan realistis dan non-realistis dalam soal cerita matematika dengan siswa kelas delapan Meksiko Martínez-Meléndez, Karol Mayreni; Juárez-López, José Antonio; Díaz-Espinoza, Irving Aarón
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 1 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i1.18651

Abstract

The present exploratory study with a qualitative approach had the objective of analyzing the type of realistic and unrealistic responses, as well as the considerations of the real-world environment in second grade high school students in Mexico in the resolution of mathematical verbal problems. To this end, students were presented with several realistic and pseudorealistic verbal problems of proportionality, false proportionality, division with remainder and arithmetic operations. Two data collection instruments were created: a verbal problem sheet and a questionnaire. The responses were classified as realistic, unrealistic, and other responses. This research showed that some of the students conceived realism in the answers based on the interpretation they were able to make of the context of the problem. That is, they took realism into account in their solution, through comments or arguments from their own experiences, by analyzing their mathematical answers to link them with the existing knowledge they have of the real world. The study contributes to the understanding of how students’ cultural background and everyday life experiences influence their approach to mathematical problem-solving, highlighting the importance of context in shaping students’ problem-solving strategies. This finding emphasizes the need for educators to recognize the value of incorporating realistic contexts in mathematical instruction to enhance students’ engagement and understanding.
Analysis of junior high school students critical thinking skills in solving contextual-based problems Padilah, Elvira Barokah; Imswatama, Aritsya; Balkist, Pujia Siti
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 1 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i1.18726

Abstract

Critical thinking skills involve analysis, evaluation, and reasoning—essential abilities that students need to navigate the challenges of globalization. However, many students still lack adequate critical thinking skills. This is evident from the 2022 Program for International Student Assessment (PISA) results, which indicate that Indonesian students' PISA scores remain low. Contextual questions, as tested in PISA, can serve as an effective tool for measuring students' critical thinking abilities. This study aims to analyze the critical thinking skills of junior high school students in solving contextual-based mathematics problems, particularly those aligned with the PISA framework. The research employs a quantitative descriptive method, administering six descriptive questions on the topic of curved surface geometry to 37 ninth-grade students at SMP Negeri 12 Sukabumi City. The findings reveal that 11% of students exhibit high critical thinking skills, 30% demonstrate moderate skills, and 59% possess low skills. Students' responses indicate that they struggle to meet the five critical thinking indicators: identifying, clarifying, analyzing, evaluating, and inferring. Based on data analysis, it can be concluded that the critical thinking ability of students at SMP Negeri 12 Sukabumi City remains low, with 59% of students categorized in the low-skill group. This study contributes to the understanding of students' critical thinking deficiencies and highlights the need for improved teaching strategies to enhance these essential skills.
Enhancing mathematical understanding through real objects: Insights from Tanzanian classrooms Deogratias, Emmanuel; Ngonyani, Christer; Gadala, Yoram
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 1 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i1.18733

Abstract

This research investigates the use of real objects and improvisation as learning aids by mathematics teachers in secondary schools within Morogoro Municipality. The study employed a quantitative approach, involving 101 mathematics teachers, to assess the effectiveness of real objects and improvisation in enhancing students' understanding of mathematical concepts. Using a case study research design, the study targeted mathematics teachers in secondary schools in Morogoro Municipality, selected through purposive and convenience sampling. The findings reveal that real objects and improvisation have great potential in enhancing students’ understanding of mathematical concepts. Real objects can be effectively used to reinforce students’ comprehension of mathematics during classroom instruction. They also facilitate easier understanding of mathematical concepts, such as perimeter and area. Additionally, real objects promote student engagement in learning mathematics during lesson delivery and help students bridge the gap between theory and practice. These findings have significant implications for the teaching and learning of mathematics, as they indicate that students become more actively engaged with mathematical concepts, while teachers improve their pedagogical practices in secondary school settings. This study recommends the use of real objects in mathematics classrooms to increase student participation, relate mathematical concepts to students’ daily experiences, and enhance learning outcomes.
Analysis of the influence of the existence of national exams, school origin, and tutoring on mathematics motivation using decision tree Abadi, Ma'ulfi Kharis; Dasari, Dadan; Fatimah, Siti; Hendriyanto, Agus
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 1 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i1.18743

Abstract

Mathematics is essential as it forms the foundation for sciences applied in the real world. Students' success in learning mathematics is crucial and must be prioritized. To understand and excel in mathematics, diligent study is required. Students who study diligently are often motivated by external factors such as outcomes, targets, environment, and teachers. Enthusiasm serves as the driving force that fosters the desire to learn effectively. Thus, motivation is a critical and consistent factor that encourages students to study diligently, ultimately improving their mathematics learning outcomes. This study examines the influence of school origin, national exams (UN), and tutoring on students' motivation to learn mathematics. The research involves a preliminary study, data collection, and analysis using a decision tree with the help of the Orange application. The results indicate that high motivation levels are more common among students attending public schools and those influenced by the presence of national exams. The findings of this study should be utilized by the government to enhance students' learning motivation and significantly improve mathematics learning outcomes. The study suggests targeted actions, including equitable resource allocation, alternative evaluation systems, teacher training, and enhanced counseling services, to effectively boost students' learning motivation and improve the overall quality of education. This research contributes by providing empirical evidence on the factors influencing students' motivation to learn mathematics, offering insights that can inform policies and interventions aimed at fostering a more effective and engaging learning environment.
English: English Nabila, Haya Fathin; Nu'man, Mulin
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 1 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i1.18757

Abstract

This study examines the relationship between religious attitudes and students' mathematics learning outcomes at Madrasah Aliyah Negeri. This correlational approach research used a sample of 54 students. Data on religious attitudes were obtained through a questionnaire based on five aspects of religiosity, while mathematics learning outcomes were obtained through midterm summative scores. The Spearman Rank correlation test was used to analyze the data and showed that religious attitude had an insignificant relationship with mathematics learning outcomes. Overall religious attitude has a correlation coefficient of -0,235. Religious attitudes have an important role in shaping students' characters, such as discipline and responsibility, although they are not significantly related to mathematics learning outcomes. This finding provides an important insight that the relationship between religiosity and math learning outcomes is not direct and may be influenced by other factors such as time management or learning motivation. In addition, this study explains the integration of Islamic values in mathematics learning, for example through linking mathematical concepts with verses from the Qur'an. The results of this study contribute to the understanding of how religious values can be integrated into mathematics education, providing a foundation for further research on alternative factors that may mediate the relationship between religiosity and academic achievement.
P Pengembangan Media Pembelajaran Pedom Cah dengan Pendekatan Kontekstual pada Materi Pecahan Sari, Wiwin Purnama; Khoiriyah, Lathifatul; Pasha, M Kemal; Amanda, Lidya Desma; Khoiriyah, Siti
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 1 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i1.18873

Abstract

Changes in education are one of the major impacts of the development of information technology. Technology has transformed the learning process from conventional to modern approaches. One innovation that can be applied is integrating learning media with technology. One such innovation is "Pedom Cah", a contextual approach-based learning media for teaching fractions. This media combines technology in the form of e-books with physical teaching aids. This study aims to develop learning media that is feasible, effective, and practical for fourth-grade students at SD Negeri 1 Wonoharjo. The research follows the Research and Development (R&D) method using the 4-D model (Define, Design, Develop, Disseminate). Data were collected through media validation, learning observations, student questionnaires, and learning outcome tests. The results of media validation obtained an average score of 4.00, exceeding the feasibility threshold of >3.00. The learning implementation achieved an average score of 87.5%, student activity scored 80.07%, student learning tests scored 84%, and student responses reached 91%. Based on these findings, it is concluded that "Pedom Cah" is a feasible, effective, and practical learning media for teaching mathematics in the classroom. This research contributes to the development of innovative, technology-based learning media that enhances student engagement and learning outcomes in mathematics.
Analysis of conjecture ability from the perspective of learning styles Ribaah, Robisha Zarifa; Yullah, Ahmad Sofi; Rahma, Marsida Aulia
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 13 No 1 (2025)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v13i1.18880

Abstract

This study investigates students' ability to make conjectures based on their preferred learning styles. A qualitative descriptive research methodology was applied. The participants consisted of ten mathematics majors enrolled in the 2024–2025 academic year. Researchers employed a purposive sampling strategy to select the subjects. The test questions and learning style surveys used in the assessment tool were reviewed and approved by expert educators. Data from the test and the learning style questionnaire were analyzed to determine students' learning styles and their ability to formulate conjectures. The results indicate that visual learners demonstrated the highest ability to make conjectures, as they tend to perceive mathematical concepts visually before solving problems. In contrast, students with auditory or kinesthetic learning styles exhibited lower conjecture-making abilities, primarily due to memory-related challenges. However, students with these learning styles can still improve their conjecture skills with appropriate instructional approaches. Enhancing students' ability to formulate conjectures enables them to better explain mathematical concepts, derive information from mathematical problems, anticipate outcomes, develop solutions, and construct well-founded arguments. This study contributes to the field of mathematics education by providing insights into how different learning styles influence students' conjecture-making abilities, which can inform the development of more effective teaching strategies.

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