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Jurnal Daya Matematis
Published by Universitas Negeri Makassar
ISSN : 23547146     EISSN : 25414232     DOI : -
Core Subject : Education,
Mathematics
Daya Matematis: Jurnal Inovasi Pendidikan Matematika is a journal that provides an authoritative source of scientific information for researchers and academics, research institutions, government agencies, and teacher education.
Arjuna Subject : -
Articles 336 Documents
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Optimization of Tofu Raw Material Inventory Using the Dynamic Lot Sizing Method Ningsi, Ria Sagita; Cipta, Hendra
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 13, No 2 (2025): Juli
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v13i2.74643

Abstract

The purpose of this study was to determine the lot size of tofu raw materials orders, the total cost of factory inventory before and after implementing inventory control using the Wagner-Within Algorithm technique on the Dynamic Lot Sizing method. With demand forecasting on the POM QM aplication consisting of Moving Average, Weighted Moving Average, and Exponential Smoothing. Based on the result obtained, the total lot size of tofu raw material orders without implementing inventory control of 15.800 kilos per year. The total cost is Rp. 189.656.040 and is more optimal when compared to the factory system, which is Rp. 208.256.040 so that the factory can save costs of Rp. 18.600.000.
The Impact of the Think-Pair-Share (TPS) Cooperative Learning Model on Students' Engagement and Mathematics Achievement in Powers and Roots Topics Djam'an, Nurwati; Nasir, Nur Anisa; Sahid, Sahid
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 13, No 2 (2025): Juli
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v13i2.71975

Abstract

This study employs a pre-experimental quantitative research design using a one-group pretest-posttest approach to examine the impact of the Think-Pair-Share (TPS) cooperative learning model on students' engagement and mathematics learning outcomes. The study population consists of Class IX students at SMP Negeri 1 Bontonompo during the odd semester of the 2024/2025 academic year. The sample was selected using cluster random sampling. Data was collected through three instruments: A student engagement questionnaire, A mathematics learning outcome test, and an observation sheet on lesson implementation. The data was analyzed using descriptive and inferential statistical methods. The descriptive analysis revealed the following key findings: The implementation of the TPS model was highly effective, with an application rate of 91.44%. Student engagement improved, as indicated by an increase in average pretest and posttest scores from 173.76 to 193.04, categorized as a moderate improvement. Mathematics learning outcomes significantly increased, with average pretest and posttest scores rising from 8.88 to 79.20. The average normalized gain was 0.77, and 80% of students achieved mastery learning. Inferential statistical analysis confirmed that the Think-Pair-Share cooperative learning model positively impacts student engagement and mathematics learning outcomes of powers and roots topic for Class IX students at SMP Negeri 1 Bontonompo
Analysis of Textbooks on Trigonometric Identity Equations in the 1975 Curriculum, Merdeka Curriculum, and the 2nd Blitzer Trigonometry Book Ely Susanti, Ely; Hiltrimartin, Cecil; Okta, Miko
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 13, No 2 (2025): Juli
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v13i2.72889

Abstract

This study aims to analyze the presentation of trigonometric identities in three textbooks used in different curricula, namely Mathematics 7 for Senior High School (1975 Curriculum), Mathematics for Senior High School/Vocational High School Grade XI Independent Curriculum (2022), and Trigonometry (2nd Edition) by Blitzer (2018). The research method uses content analysis of facts, concepts, principles, and examples of questions and problem-solving questions in these books. The results of the analysis show differences in presentation approaches, where the 1975 Curriculum book presents material in a simple but less systematic manner, the Independent Curriculum combines context but is less consistent, and the Blitzer book presents comprehensive material with a focus on real-world applications. Analysis of questions based on cognitive levels and the PISA framework places the Blitzer book as superior in terms of the variety and depth of questions. These findings are important as material for evaluating and developing textbooks to improve understanding and competitiveness of mathematics education at national and international levels.
The Effect of the Discovery Learning Model Assisted by Kahoot on the Mathematical Critical Thinking Ability of Class X Students of SMAN 1 Utan Hatimah, Husnul; Azmi, Syahrul; Kurniawan, Eka
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 13, No 2 (2025): Juli
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v13i2.75714

Abstract

The purpose of this study is to ascertain how the Discovery Learning learning paradigm, with Kahoot's assistance, affects the mathematical critical thinking abilities of SMAN 1 Utan class X pupils throughout the 2024/2025 academic year. This type of research is a quasi-experimental with a Post-test Only Control Group Design, involving two classes, namely the experimental class (X-6) and the control class (X-5). While the control class employs a traditional learning model, the experimental class uses the Discovery Learning learning paradigm with Kahoot's help.  Post-test questions on critical thinking abilities and observation sheets for learning implementation serve as the research tools.  According to the findings, the experimental class's average post-test score was 78.27, which was higher than the control class's average score of 64.89. A statistically significant difference between the two classes was revealed by the Mann-Whitney U test.  With an effectiveness of 78.93%, the effect size (Cohen's d) of 0.80407 suggests a moderate effect. The experimental class is primarily in the very high category on the interpretation and evaluation indicators, while the control class is primarily in the high category on the analysis indicator and low on the inference indicator, according to the distribution of critical thinking ability categories by indicator. These results indicate that the use of Kahoot-assisted Discovery Learning can influence students' critical thinking abilities overall.
The Influence of the Montessori Approach on Mathematical Problem-Solving Skills Among Fourth-Grade Elementary Students Hidayat, Resti Resti; Supriadi, Supriadi; Hendriawan, Dedi; Fajriani, Putri
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 13, No 2 (2025): Juli
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v13i2.76010

Abstract

Problem-solving ability is a higher-order thinking skill essential to develop from the elementary school level. However, mathematics instruction in elementary schools remains predominantly conventional and has not yet optimally fostered students' critical thinking and systematic problem-solving skills. This study aims to analyze the effect of the Montessori approach on the mathematical problem-solving abilities of fourth-grade elementary students. This research employed a quantitative approach with a quasi-experimental design, specifically a non-equivalent control group pretest-post test design. The sample consisted of 60 students, divided into 30 students in the experimental group and 30 in the control group. The results of the paired sample t-test indicated a significant improvement in the experimental group, with a mean pretest score of 20.3 and a post-test score of 30.7, along with a significant value of 0.000 (p < 0.05). Furthermore, the Mann–Whitney U test on the gain scores yielded a significance value of 0.000, demonstrating a statistically significant difference in the improvement of problem-solving abilities between the experimental and control groups. The findings confirm that the Montessori approach is effective in enhancing students' problem-solving skills in mathematics learning.
Ethnomathematic Analysis: Geometry in Silk Woven Sarongs Quraisy, Andi; Nursakiah, Nursakiah; Mutmainnah, Mutmainnah
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 13, No 2 (2025): Juli
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v13i2.76283

Abstract

This study aims to explore geometric concepts in the motifs of Wajo silk woven sarongs (lipa' sabbe) through an ethnomathematics approach. The method used is exploratory with an ethnographic approach to reveal the mathematical values contained in local cultural heritage. The results of the study show that woven sarong motifs contain various geometric concepts such as symmetry (reflection, rotation), transformation (translation), and basic geometric shapes (squares, rhombuses, triangles). Each sarong motif represents mathematical principles that can be explained through the Cartesian coordinate system and isometric transformations. This study demonstrates that traditional weaving is not only an expression of cultural art but can also serve as an educational medium in contextual mathematics learning based on local culture. The integration of ethnomathematics in education is expected to enhance students' understanding of abstract mathematical concepts and foster appreciation for regional culture.
Development of a Flipbook Learning Media Based on a Problem-Based Learning Model to Improve Mathematical Literacy Skills and Students' Motivation for Learning on the Pythagorean Theorem in Grade VIII at State Junior High School 40 Medan Simarmata, Putri Sonia; Mulyono, Mulyono; Lubis, Asrin; Nasution, Hamidah
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 13, No 3 (2025): December (article on Progress)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v13i3.77215

Abstract

Based on the results of initial observations at SMP Negeri 40 Medan, there are teachers who have not maximized the design, development, and utilization of learning media, especially flipbook media that has never been implemented. As well as the mathematical literacy skills and learning motivation of students are still low. This study aims to (1) produce flipbook media based on the Problem Based Learning learning model that is valid, practical and effective, (2) analyze the improvement of mathematical literacy skills and (3) analyze the improvement of student learning motivation using flipbook media based on Problem Based Learning. This study uses the ADDIE model. This study involved class VIII students of SMP Negeri 40 Medan. The instruments used in the development of flipbook media are Teaching Modules, LKPD, Mathematical Literacy Ability Tests and Student Learning Motivation Questionnaires. The results of the study are that the flipbook media meets the valid criteria with a score of 4.69, then the flipbook media was tested to obtain practical and effective media so that it meets the practical criteria with a score of 88.95, and the flipbook media meets the effective criteria with a score of 87.79. The increase in mathematical literacy skills measured by N-gain on the development trial conducted twice against pretest with posttest I with an average N-gain of 0.33 in the medium category, then against posttest I and posttest II with an average N-gain of 0.73 in the high category. Furthermore, the increase in students' learning motivation by measuring the pretest and posttest with an average N-gain of 0.6 in the medium category. Based on the N-gain results, it is stated that flipbook media based on the Problem Based Learning learning model is able to improve students' mathematical literacy skills and learning motivation at SMP Negeri 40 Medan.
Analysis the Validity of Realistic Mathematics Education (RME) Learning Module on Integers Operations for Grade VII Dianti, Zulfa; Irawan, Dody; Nevrita, Nevrita; Zaitun, Zaitun
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 13, No 3 (2025): December (article on Progress)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v13i3.77380

Abstract

This study aims to describe validity level of mathematics learning module based on Realistic Mathematics Education (RME) on topic of integer operations for seventh-grade students. This research is part of Research and Development study using ADDIE model, which consist the stages of Analysis, Design, Development, Implementation, and Evaluation. However, this article focuses only on Development stage, specifically the product validity test by experts. The validation subjects included six validators divided into three expert groups, namely two material experts, two language experts, and two media experts. The instrument used was validation sheet covering four aspects: content feasibility, language, presentation, and graphics. The data were analyzed quantitatively based one the percentage of validation results. The findings showed that module achieved average validity score of 88,50% (very valid), consisting of 89,5% for content, 91% for language, and 85% for media aspects. Thus, RME-based mathematics module developed in this study meets validity criteria and is suitable for classroom implementation.
The Effect Of Problem-Based Learning Model On Students' Mathematical Representation Ability And Self-Confidence Pohan, Lisa Rahmadani; Mukhtar, Mukhtar; Simamora, Elmani
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 13, No 3 (2025): December (article on Progress)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v13i3.78576

Abstract

This study seeks to determine: (1) the effect of the Problem Based Learning model on students' mathematical representation skills, (2) its effect on students' self-confidence, (3) the effect of initial mathematical ability (High, Medium, Low) on students' mathematical representation skills, (4) its effect on students' self-confidence, and (5) the learning model's interaction with This study is quasi-experimental. This study included MAN 2 Model Medan grade XI students in the 2024/2025 even semester. The study included 34 students from class XI-F2 B, which used the Problem Based Learning model, and class XI-F2 C, which used the expository approach. Research data came from the Initial Mathematical Ability test, mathematical representation ability test, and student self-confidence questionnaire. The data analysis was two-way ANOVA. The data analysis showed that the Problem Based Learning model affected students' mathematical representation skills, self-confidence, and initial mathematical ability (High, Medium, Low). (5) The learning model and initial mathematical aptitude (High, Medium, Low) affect students' mathematical representation ability and self-confidence.
Developing a Drill-and-Practice-Based Scratching Learning Media to Improve Mathematical Problem-Solving Skills and Students' Mathematics Learning Motivation Junior High School 2, Tebing Tinggi City Utari, Kania; Rajagukguk, Waminton; Surya, Edy
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 13, No 3 (2025): December (article on Progress)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v13i3.78571

Abstract

Students should be able to answer real-life math problems; therefore, mathematical problem-solving is crucial. Math problem-solving is improved by computer media. Educational media that meets students' needs motivates and inspires them, enhancing learning outcomes. Students' quantitative problem-solving skills will improve math learning results. Scratch is a computer-based learning tool that improves learning. The goal of this research is to use Scratch as a learning medium to improve students' mathematical problem-solving skills and motivation to learn mathematics. SMP Negeri 2 Kota Tebing Tinggi 7th graders completed this investigation in 2024/2025. This development research produced a valid, practical, and successful drill-and-practice-based visual learning medium to improve students' problem-solving and learning motivation. Media validity averaged 3.40, material validity 3.60, and linguistic validity 3.79. Teacher questionnaire scores averaged 3.67, while student questionnaire scores averaged 3.13 in the "Interested" category. The average learning implementation score rose to 3.25 in the second trial. Improved mathematical problem-solving and motivation were "moderate."

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