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All Journal Jurnal Infinity Kreano, Jurnal Matematika Kreatif-Inovatif P2M STKIP Siliwangi MaPan : Jurnal Matematika dan Pembelajaran Journal of Honai Math International Journal on Emerging Mathematics Education Indiktika : Jurnal Inovasi Pendidikan Matematika Teorema: Teori dan Riset Matematika SJME (Supremum Journal of Mathematics Education) M A T H L I N E : Jurnal Matematika dan Pendidikan Matematika JPMI (Jurnal Pembelajaran Matematika Inovatif) (JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING MATHEMA: JURNAL PENDIDIKAN MATEMATIKA Jurnal Infinity Pi Radian Journal
Harry Dwi Putra, Harry Dwi
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Education Mathematics Social Sciences Other

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Enhancing Mathematical Understanding Ability, Creative Thinking Skills and Self Confidence through Open-Ended Approach on Junior High School Students Desi, Desi; Putra, Harry Dwi; Hendriana, Heris
(JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING Vol. 8 No. 1 (2025): VOLUME 8 NUMBER 1, MARCH 2025
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jiml.v8i1.24788

Abstract

T he open-ended approach in mathematics education has been proven effective in enhancing deeper understanding, creative thinking skills, and student self-confidence by encouraging exploration and allowing multiple solutions. This study aims to evaluate the effectiveness of the open-ended approach in improving mathematical understanding, creative thinking skills, and self-confidence among junior high school students, as well as to identify specific strategies within this approach that most significantly contribute to these educational outcomes. The research employed a quasi-experimental design with a pre-test and post-test control group. Participants were junior high school students divided into two groups: an experimental group that received instruction using the open-ended approach and a control group taught using traditional methods. Data were collected through tests measuring mathematical understanding, creative thinking skills, and self-confidence, administered before and after the intervention. Statistical analysis of the results indicated that students in the experimental group showed significant improvement in mathematical understanding, creative thinking skills, and self-confidence compared to the control group. This study concludes that the open-ended approach is more effective than traditional teaching methods in enhancing these educational outcomes among junior high school students. The findings highlight the importance of implementing the open-ended approach in mathematics education to provide more meaningful learning experiences and better prepare students for complex problem-solving tasks.
How to make “Sumedang” tofu: An ethnomathematics context from West Java Putra, Harry Dwi; Ramdhani, Sendi
Journal of Honai Math Vol. 8 No. 1 (2025): Journal of Honai Math
Publisher : Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jhm.v8i1.690

Abstract

Mathematics is one of the subjects that involves abstract concepts, which often poses difficulties for students in understanding the material. One solution to address these challenges is to connect mathematical concepts to students' everyday lives. Sumedang Tofu is a traditional food that is already familiar to students. The abstract mathematical concepts can be understood contextually through the production of Sumedang Tofu. This study aims to explore the mathematical concepts involved in the production of Sumedang Tofu that can be utilized in contextual learning. The research method employed is qualitative descriptive with an ethnographic approach. The research instruments consist of observation sheets, interview guidelines, and documentation sheets. Data collection techniques include direct observation at the Sumedang Tofu production site, interviews with Sumedang Tofu craftsmen, and photographs of the tools used in the production process. The collected data were analyzed using triangulation. The results indicate that in the production of Sumedang Tofu, there are concepts of flat shapes, such as squares and rectangles, as well as three-dimensional shapes, including cubes, rectangular prisms, and open-top cylinders. Additionally, concepts of division, proportionality, and congruence are also present. Sumedang Tofu can serve as a medium for contextual learning in teaching these mathematical concepts.
Peningkatan kemampuan representasi matematis siswa menggunakan model problem based learning Arti Maryanti; Putra, Harry Dwi; Yuspriyati, Devi Nurul
JPMI (Jurnal Pembelajaran Matematika Inovatif) Vol. 8 No. 2 (2025): JPMI
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jpmi.v8i2.26887

Abstract

The purpose of this study is to determine the improvement of students' mathematical representation ability after applying the Problem Based Learning (PBL) Model in junior high school students. The research method used is a quasi-experimental research with a Control Group Pretest-Posttest Design. The sample of this study consisted of 30 students in the experimental class and 30 in the control class. The sample in this study was taken by simple random sampling. Data collection was used using a mathematical representation ability test sheet. The data analysis techniques used are the N-Gain test, and the independent t-test. The results of the study were obtained: (1) The application of the PBL model can improve the ability of mathematical representation with an average N-Gain value of 0.43 which is classified as "moderate", (2) Based on the independent t-test, obtained 0.000, it can be concluded that the mathematical representation ability of students who are taught the PBL model is better than the mathematical representation ability of students who are taught with regular learning.
Bagaimana model problem based learning dapat meningkatkan kemampuan pemecahan masalah matematis? Salsabila, Hilma; Putra, Harry Dwi; Yuspriyati, Devi Nurul
JPMI (Jurnal Pembelajaran Matematika Inovatif) Vol. 8 No. 2 (2025): JPMI
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jpmi.v8i2.26889

Abstract

This research aims to determine the increase in students mathematical peoblem solving abilities after receiving the problem based learning model. The research method used wa a quasi-experimental method with a nonequivalent control group research design. The population of this study was all students of class VIII MTsN 3 Bandung Barat consisting of four classes. The sample for this research was class VIII C students as the control class applying the normal learning model and class VIII A students as the experimental class applying the problem based learning model. The data obtained was then analyzed quantitatively using the difference between two means test. The process off analizing data involves calculating the average pre-test and post-test scores, the normality test, data with normal distribution continues with the homgeneity test and finally teh t9test. The research result show that there is an increase in students mathematical problem solving abilities after using the problem based learning model.
Analysis of Junior High School Students' Mathematical Problem-Solving Skills in Solving Social Arithmetic Problems Mardiansyah, Dian; Hendriana, Heris; Supriatna, Tatang; Putra, Harry Dwi
(JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING Vol. 8 No. 2 (2025): VOLUME 8 NUMBER 2, JUNE 2025
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jiml.v8i2.23842

Abstract

Education is the main foundation in character building and individual intellectual abilities. Mathematical problem solving ability is one of the important skills that must be mastered by students in the modern educational era, especially in the context of social arithmetic material that is often applied in everyday life. This study aims to analyze the mathematical problem solving ability of students in class VII-A at SMPN 3 Cisarua in solving social arithmetic problems. This research uses a descriptive qualitative approach with data collection methods through interviews with math teachers and observations of students during the learning process and problem solving. The data analysis process was carried out descriptively to describe the variations in students' problem solving abilities and the factors that influence these abilities. The results of the analysis show that the mathematical problem solving ability of students in class VII-A at SMPN 3 Cisarua still varies, with some students showing significant improvement after the application of the Problem-Based Learning (PBL) learning method. Factors such as student engagement in learning, understanding of mathematical concepts, and critical thinking ability affect students' mathematical problem solving ability. The application of PBL method can be one of the effective strategies to improve student engagement, understanding of mathematical concepts, and mathematical problem solving skills. In conclusion, PBL method is proven to be an effective strategy to improve students' engagement, understanding of concepts, and their mathematical problem solving skills, so it can be implemented more widely in mathematics learning.
Analysis of Students’ Errors in Solving Mathematical Critical Thinking Problems on Junior High School Sodik, Rahmat; Hendriana, Heris; Supriatna, Tatang; Putra, Harry Dwi
(JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING Vol. 8 No. 2 (2025): VOLUME 8 NUMBER 2, JUNE 2025
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jiml.v8i2.23858

Abstract

Critical thinking ability is one of the important competencies that students must have in facing challenges in the information age. This research aims to identify the types of errors made by class VII junior high school students in solving critical thinking skills questions on algebra material. This research uses a qualitative descriptive approach with the research subjects were 32 students in class VII.7, data collection was carried out through written tests containing critical thinking questions. It was found that several students made mistakes in solving algebra material questions, namely 1) Not understanding the concept of algebra definition; (2) The settlement process is not systematic; (3) There is no resolution process, go straight to the answer; (4) Do not understand the meaning of the question; (5) Weak in analyzing and arguing (6) Difficulty modeling problems in algebraic form; (7) Not understanding how to calculate operations and the properties of algebraic operations; (8) No identification of questions, no collection and compilation of data in the questions; (9) Not familiar with complex multiple choice questions. This research shows that students' critical thinking skills in solving algebra problems are still low. This is caused by several factors, such as a lack of in-depth understanding of concepts, lack of process skills, and less effective study habits. To improve students' critical thinking abilities, improvements in learning need to be made, such as strengthening understanding of concepts, developing process skills, and improving study habits.
Enhancing Students’ Mathematical Critical Thinking Skills through STEM Learning on Junior High School Pratiwi, Fresty Restu; Hendriana, Heris; Supriatna, Tatang; Putra, Harry Dwi
(JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING Vol. 8 No. 2 (2025): VOLUME 8 NUMBER 2, JUNE 2025
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jiml.v8i2.23894

Abstract

This study aims to Enhancing Students' Mathematical Critical Thinking Skills Through Stem Learning On Junior High School. Critical thinking is an essential component in mathematics education, as it equips students with the ability to solve real-world problems, analyze data, and develop deeper conceptual understanding. The study adopts a quasi-experimental design with a pretest-posttest control group, involving seventh-grade students from SMPIT Mentari Ilmu. The experimental group (VII Shofiyyah) was taught using STEM-based learning, while the control group (VII Khaula) received conventional instruction. Both groups were assessed through pretests and post-tests to evaluate improvements in critical mathematical thinking skills. The data were analyzed using descriptive statistics, normality tests, and independent t-tests to determine the significance of the results. Findings indicated that the experimental group significantly outperformed the control group, with higher post-test scores reflecting greater improvement in critical thinking skills. Moreover, the students and teachers expressed positive responses to the STEM-based approach, highlighting its effectiveness in fostering engagement and higher-order thinking. The study concludes that STEM-based learning serves as an effective pedagogical strategy for enhancing critical thinking in mathematics, making it a valuable tool for junior high school education. The results suggest that this approach should be further developed and implemented to promote students' critical thinking abilities in various educational contexts.
Implementation of Open-Ended Approach to Improve Mathematical Creative Thinking Skills and Self-Efficacy Ihwana, Mirna; Putra, Harry Dwi; Sumarmo, Utari
(JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING Vol. 8 No. 2 (2025): VOLUME 8 NUMBER 2, JUNE 2025
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jiml.v8i2.25613

Abstract

This study looks at mathematical thinking and self-efficacy, which is a wonderful idea because everyone needs to be innovative and creative to keep up with technology advancements in the age of society 5.0. Additionally, each student's self-efficacy may rise as a result. The study employed quantitative methodologies, with a sample size of thirty individuals for both the experimental and control groups. The researchers developed two instruments to facilitate the measurement of abilities. One of the instruments is a test with questions that are intended to assess the creative mathematical thinking skills of the subjects, including Agility (flexibility), Authenticity (originality), and Details (elaboration). Based on the study's findings, it can be concluded that the research findings indicate that students taught mathematics through the Open-Ended approach demonstrated a higher level of development of creative mathematical thinking skills compared to those taught through traditional approaches. end up outperforming others who were educated utilizing conventional approaches. The research discussion results revealed that students who were taught mathematics using an Open-Ended approach demonstrated a greater development in creative mathematical thinking abilities than those who were taught using a conventional method. This conclusion was reached based on the research findings and the debate that followed. completed the task more successfully than those instructed using conventional ways. The study's results and the discussion that followed led to the conclusion that, in terms of developing students' potential for mathematical creativity, there was no connection between the learning technique and students' baseline mathematical proficiency. There is no correlation between beginning mathematical competency and learning methodologies and increasing pupils' self-efficacy, according to research and discussion.
Development of Student Worksheets to Improve the Ability of Mathematical Problem Posing Putra, Harry Dwi; Herman, Tatang; Sumarmo, Utari
International Journal on Emerging Mathematics Education IJEME, Vol. 1 No. 1, March 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/ijeme.v1i1.5507

Abstract

Activities posing and solving a problem are important parts in mathematics, so the problem posing is an activity that was instrumental in mathematical thinking and become an important part in solving the problem. This type of research is research and development that aims to develop student worksheets through scientific approach with what if not strategy. The research method consists of stages: literature study, observation, interviews, development of student worksheets, assessment of two experts, and restricted trial to the eleventh grade students in SMAN 2 Cimahi, SMAN 3 Cimahi, and SMAN 4 Cimahi. Based on the findings, it was concluded that the student worksheets through scientific approach with what if not strategy load some activities including observing, questioning, trying, reasoning, and concluding. The activity of questioning using what if not strategy involves changing data, adding data, changing data with the same question, or changing question with the same data. The student worksheets also presented some contextual problems in accordance with the experience of students. After tested using worksheet, the improvement of student mathematical problem posing in the three schools was in moderate criteria.
How Students’ Self-Efficacy Can Affect Their Mathematical Critical Thinking Ability? Suhartini, Tutin; Hendriana, Heris; Putra, Harry Dwi
(JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING Vol. 8 No. 3 (2025): VOLUME 8 NUMBER 3, SEPTEMBER 2025
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jiml.v8i3.26650

Abstract

Critical thinking is an essential skill that students must possess in order to face various academic challenges and the dynamic development of scientific knowledge. Among psychological factors, self-efficacy plays a significant role in students' mathematical critical thinking skills, enabling them to solve tasks or problems in specific situations. This study aims to examine the influence of self-efficacy on students’ mathematical critical thinking abilities. The research employed a quantitative approach with a correlational design to analyze and explore in depth how self-efficacy affects students’ mathematical critical thinking skills. The sample consisted of 25 students from SDN Harapan Mulya. Data analysis was conducted using simple linear regression to determine the extent to which students’ self-efficacy influences their mathematical critical thinking abilities. The results showed a positive and significant influence between self-efficacy and critical thinking skills (p < 0.05), with a coefficient of determination of 0.224. This indicates that students’ self-efficacy contributes 22.4% to the variation in their mathematical critical thinking abilities. Therefore, the conclusion of this study is that the higher the students’ self-efficacy, the higher their mathematical critical thinking skills, which means that self-efficacy significantly influences students’ mathematical critical thinking. These findings highlight the importance of strengthening self-efficacy through various learning approaches to enhance students’ mathematical critical thinking skills.
Co-Authors Abdullah, Nur Aflich Yusnita Fitrianna Akbar, Muhamad Fijar Rotul Akhdiyat, Agil Maulana Andiarani, Miranti Anik Yuliani Arti Maryanti Asep Ikin Sugandi Assya, Lily Aulin Astuti, Veni Aprilia Dwi Azzahrah, Astriani Danny, Firman Desi Desi, Desi Devi Nurul Yuspriyati, Devi Nurul Dini Apriani, Dini Fauziyyah, Herlina Fauzy, Alwan Fitria, Nury Ainun Habibullah Habibullah Haji, H Saleh Hakim, Fahril Heris Hendriana Ida Nurhayati Ihwana, Mirna Ika Wahyu Anita Jaenal, Enjang Komariah, Euis Nur Lathifah, Adiska Nadiyah Mardiansyah, Dian Miftahudin, Rifqi Aulia Mulyadi, Magdalena Mustika, Chintya Zulvi Nelly Fitriani, Nelly Nurcahyati, Yoanda Nurdin, Irfan Taufik Pratiwi, Fresty Restu Pratiwi, Meitia Putri Puji Nurfauziah, Puji Putri, Astriana Ronny, Renata Teddy Roswahyuliani, Lestari Ruchiyat, Radifan Irsaly Rusmawan Rusmawan, Rusmawan Saadah, Haniyah nur Salsabila, Hilma Sendi Ramdhani Septripiyani, Kesi Setiany, Elvira Permata Siti Nurlaela Siti Rosidah Sodik, Rahmat Suhartini, Tutin Supriatin, Cucu Supriatna, Tatang Tatang Herman, Tatang Utari Sumarmo Wahyu Hidayat Wardani, Adeliasari Kusuma Widiartini, Amas Yulianti, Neneng Yumiati