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All Journal Jurnal Daya Matematis NUMERICAL (Jurnal Matematika dan Pendidikan Matematika) JURNAL PENDIDIKAN TAMBUSAI Jurnal Cendekia : Jurnal Pendidikan Matematika Jurnal Perspektif JURNAL PEMBELAJARAN DAN MATEMATIKA SIGMA (JPMS) PHI: Jurnal Pendidikan Matematika GAUSS: Jurnal Pendidikan Matematika Jurnal Fibonaci: Jurnal Pendidikan Matematika IJORER : International Journal of Recent Educational Research Ethnomathematics Journal Interdisciplinary Social Studies Formosa Journal of Multidisciplinary Research (FJMR) Jurnal MathEducation Nusantara Journal of Educational Analytics Jurnal Pengabdian Masyarakat Dharma Andalas Asian Journal of Applied Education SENSEI INTERNATIONAL JOURNAL OF EDUCATION AND LINGUISTICS (SIJEL)
Simanjorang, Mangaratua M
Universitas Negeri Medan
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Physics Public Health Social Sciences Other

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Journal : Jurnal Daya Matematis

 1 
Development Of Learning Aid To Improve The Understanding Of Mathematical Concepts Of Students With Visual Disabilities In Special Schools Part A (Slb A) Pure Work Ikhsan, Muhibbul; Simanjorang, Mangaratua M; Mukhtar, Mukhtar
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 12, No 3 (2024): Desember
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v12i3.68082

Abstract

This study aims to improve the understanding of Mathematics concepts through Geoboard learning media for students with visual disabilities at the SLB-A Karya Murni Education Foundation. This research was conducted at Yayasan Pendidikan SLB-A Karya Murni, which is one of the Junior High Schools (SMP) for students with visual disabilities in Medan City, North Sumatra. In this study using the type of R&D research refers to the ADDIE development model (Analysis, Design, Development, Implementation, Evaluation). The subjects in this study were seventh grade students of the SLB-A Karya Murni Education Foundation in the 2023/2024 academic year. The product draft in this study has been designed and then validated by 2 experts, namely Material Experts and Media Experts. The results of the initial stage validity test by material experts obtained an average percentage of 46.15% (Less Feasible), Stage two validity test by material experts obtained an average percentage of 88.46% (Very feasible), Stage one validity test by media experts obtained an average percentage of 47.5% (Less feasible), and Stage two validity test by media experts obtained an average percentage of 91.25% (Very Feasible). Understanding of concepts in mathematics learning is obtained from learning activities on flat building material, the results of which are effective assessment with a significant increase in learning outcomes with the category of Nominalised Gain index 0.67 <0.7 classified as (Moderate).This research produces a product in the form of learning media in the form of Geoboard. The Geoboard is feasible to use judging from the percentage obtained in each manufacturing process.
The Effect of Problem Posing Learning Model and Student Attitudes on Mathematics Learning on the Critical Thinking Ability of Mathematics Students in Grade VIII of SMPN 6 Percut Sei Tuan Giawa, Freddy; Simanjorang, Mangaratua Marianus; Khairani, Nerly
Daya Matematis: Jurnal Inovasi Pendidikan Matematika Vol 13, No 1 (2025): Maret (article in pres)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jdm.v13i1.71308

Abstract

This study examines the influence of the Problem Posing learning model and students' attitudes towards mathematics on the critical thinking skills of grade VIII students of SMPN 6 Percut Sei Tuan. Using a quasi-experimental approach with two groups, the experimental group taught using the Problem Posing model and the control group taught using regular learning, this study aims to analyze the effectiveness of Problem Posing in developing critical thinking skills. Data was collected through critical thinking skills tests (pretest and posttest) and mathematical attitude questionnaires during the odd semester of the 2024/2025 school year. The results of the two-track ANOVA analysis with a significance level of 0.05 showed that the Problem Posing learning model had a significant influence on students' critical thinking skills (F=28.789; sig.=0.000<0.05). Furthermore, students' attitudes towards mathematics which were categorized as high, medium, and low were also proven to have a significant effect on critical thinking skills (F=6.769; sig.=0.000<0.05). However, this study did not find any interaction between the Problem Posing learning model and students' attitudes in influencing critical thinking skills (F=0.658; sig.=0.532>0.05), which indicates that these two variables contribute to influence independently without moderation effects. These findings suggest that the Problem Posing model can effectively improve students' critical thinking skills regardless of their attitude towards mathematics, while a positive attitude towards mathematics in general contributes to better critical thinking skills.
Co-Authors Adinia, Annisa Fajrika Agnes Lucyana Purba Aini, Nur Hidayah Aritonang, Karyn Angelina Asrin Lubis Barus, Aferbina Br Bornok sinaga Bornok Sinaga Ekaputri, Hardianti Erliananda, Dinda Giawa, Freddy Gomgom Sibarani Hafizd Darmawan Hamidah Nasution Hijriyanti, Putri Ikhsan, Muhibbul Ita Margaretta Tarigan Joskar Simbolon Khairani, Nerly Lidia Saminer Pakpahan Lola Ressa Br Tarigan Mardhatillah Mardhatillah Muhammad, Mari Mukhtar Mukhtar Mukhtar Mukhtar Mulyono Mulyono mulyono mulyono Nurhasanah Siregar Pakpahan, Riana N Pargaulan Siagian putri, Annisa Dameria Sianturi, Yohana Dameria Simamora, Dhara Chiltya Sinaga, Maria Elisabet Siti Salamah Br Ginting Sunita Indira Syawal Gultom Togi A Napitupulu Yenny Farida Br Ginting