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All Journal JURNAL PENDIDIKAN TAMBUSAI Jurnal Ilmiah Mandala Education (JIME) JUPE : Jurnal Pendidikan Mandala Jurnal Pengabdian kepada Masyarakat Nusantara JURNAL PENDIDIKAN SAINS SOSIAL DAN AGAMA Dharmas Education Journal (DE_Journal) Indo-MathEdu Intellectuals Journal Jurnal MathEducation Nusantara JURNAL CURERE Journal of Comprehensive Science Jurnal Ilmu Pendidikan dan Sosial Journal of Artificial Intelligence and Digital Business Innovative: Journal Of Social Science Research Journal of Sustainable Community Service JIM: Jurnal Ilmiah Mahasiswa Pendidikan Sejarah Jurnal Pengabdian Masyarakat SAMBARA: Jurnal Pengabdian Kepada Masyarakat
Tambunan, Hardi
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Journal : Indo-MathEdu Intellectuals Journal

 1 
Penerapan Pendekatan Matematika Realistik (PMR) pada Materi Trigonometri untuk Meningkatkan Pemahaman Konsep Lubis, Mindo Juliani Kelly; Panggabean, Ellis Mardiana; Tambunan, Hardi
Indo-MathEdu Intellectuals Journal Vol. 6 No. 1 (2025): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i1.2743

Abstract

This study aims to determine the improvement of students' ability to understand mathematical concepts by using the Realistic Mathematics Approach (PMR). This study is a pseudo-experimental research with posttest only control group design. The population of this study is all students of grade XI SMK Negeri 6 Medan even semester of the 2025 school year with a total of 280 students and distributed into 8 classes. The sample of this study is class X Accounting 1 with a total of 36 students as an experimental class and class X Accounting 2 with a total of 35 students as a control class. Data were collected using tests and statistically analyzed to find out the differences between the two classes. The results of the hypothesis test with the Mann Whitney U test, it is known that the value of Z-count = 1.879 is more than Z-critical = 1.645. This shows that the median concept understanding of students who follow learning with the PMR Approach is higher than the median concept understanding that follows regular learning. The average value of students' concept understanding in the class applying the PMR approach x ̅=62 was higher than the class that followed the usual learning where x ̅=53. Thus, it can be concluded that the understanding of mathematical concepts of students who participate in learning with the PMR approach is higher than the understanding of mathematical concepts of students who follow ordinary learning
Kesulitan Membedakan Soal Cerita FPB Dengan KPK pada Siswa Tingkat Sekolah Menengah Pertama Pasaribu, Anita Sabrina; Panggabean, Ellis M.; Tambunan, Hardi
Indo-MathEdu Intellectuals Journal Vol. 6 No. 2 (2025): Indo-MathEdu Intellectuals Journal (In-Press)
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i2.2794

Abstract

This study aims to describe the difficulties in distinguishing FPB and KPK story questions in junior high school students. This study uses a qualitative descriptive method. Data collection was carried out through observation, interviews, and document analysis. Observations are made during mathematics learning to identify students' problem-solving approaches. The collected data is analyzed using thematic analysis. The results of data analysis show that the presentation of questions in the form of stories is an effort to create a story to apply the concepts being learned according to daily experience. The difficulty of students distinguishing between FPB and KPK stories lies in the question model. The way to distinguish between FPB and KPK story problems is to plant the concept that FPB is a factor or divider, so that the value is small. Meanwhile, the KPK is a multiple, which of course has a large value and looks at the model of the question
Kesulitan Membedakan Soal Cerita FPB Dengan KPK pada Siswa Tingkat Sekolah Menengah Pertama Pasaribu, Anita Sabrina; Panggabean, Ellis M.; Tambunan, Hardi
Indo-MathEdu Intellectuals Journal Vol. 6 No. 2 (2025): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i2.2794

Abstract

This study aims to describe the difficulties in distinguishing FPB and KPK story questions in junior high school students. This study uses a qualitative descriptive method. Data collection was carried out through observation, interviews, and document analysis. Observations are made during mathematics learning to identify students' problem-solving approaches. The collected data is analyzed using thematic analysis. The results of data analysis show that the presentation of questions in the form of stories is an effort to create a story to apply the concepts being learned according to daily experience. The difficulty of students distinguishing between FPB and KPK stories lies in the question model. The way to distinguish between FPB and KPK story problems is to plant the concept that FPB is a factor or divider, so that the value is small. Meanwhile, the KPK is a multiple, which of course has a large value and looks at the model of the question
Eksplorasi Alat Musik Angklung Terhadap Konsep Tabung Simamora, Rona Marisa; Tambunan, Hardi; Simanjuntak, Ruth Mayasari
Indo-MathEdu Intellectuals Journal Vol. 6 No. 5 (2025): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i5.4099

Abstract

This research uses a qualitative approach with exploratory research type. The study was conducted in class IX of SMP Santo Mikael Indramayu with a sample of 30 students to integrate the concept of mathematical three-dimensional shapes through the exploration of the traditional musical instrument angklung. The research instruments used included observation sheets to record student activities and interactions, and interview guides to explore the responses of students and teachers to exploration-based learning. The data obtained were analyzed using qualitative descriptive analysis techniques, namely by reducing the data, presenting the data in narrative form, and drawing conclusions. The measurement data was used to calculate the surface area and volume of the cylinder, while also observing the relationship between the size of the cylinder and the notes produced. The results show that tubes with large diameter and height produce low tones, while smaller sizes produce high tones. This contextual approach based on ethnomathematics enhances student engagement, understanding of concepts, and critical thinking skills. Learning becomes more meaningful as mathematics is seen as a part of daily life and culture, in line with contextual learning theory and ethnomathematics.
Eksplorasi Alat Musik Keteng-Keteng Terhadap Bangun Ruang Sisi Lengkung Tabung Sitepu, Edi Petra; Tambunan, Hardi; Simanjuntak, Ruth Mayasari
Indo-MathEdu Intellectuals Journal Vol. 6 No. 5 (2025): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i5.4116

Abstract

This study aims to examine the relationship between the traditional Keteng-keteng musical instrument from Batak Karo and the concept of curved tube space construction from an ethnomathematics perspective. The research uses Spradley's ethnographic approach with data collection techniques through observation, interviews, and documentation. The data obtained is analyzed using Spradley's ethnographic analysis model, which includes domains, taxonomy, components, and cultural themes, thereby providing a deep understanding of the relationship between cultural objects and mathematical concepts. The results of the study show that the bamboo structure of Keteng-keteng is tube-shaped, characterized by two circular bases and a curved cover. This finding indicates that Keteng-keteng can be used as an ethnomathematics learning medium to introduce the concept of tubes to students. In addition, this study also contributes to efforts to preserve local culture through the integration of traditional elements into mathematics learning.
Penerapan Pendekatan Matematika Realistik (PMR) pada Materi Trigonometri untuk Meningkatkan Pemahaman Konsep Lubis, Mindo Juliani Kelly; Panggabean, Ellis Mardiana; Tambunan, Hardi
Indo-MathEdu Intellectuals Journal Vol. 6 No. 1 (2025): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i1.2743

Abstract

This study aims to determine the improvement of students' ability to understand mathematical concepts by using the Realistic Mathematics Approach (PMR). This study is a pseudo-experimental research with posttest only control group design. The population of this study is all students of grade XI SMK Negeri 6 Medan even semester of the 2025 school year with a total of 280 students and distributed into 8 classes. The sample of this study is class X Accounting 1 with a total of 36 students as an experimental class and class X Accounting 2 with a total of 35 students as a control class. Data were collected using tests and statistically analyzed to find out the differences between the two classes. The results of the hypothesis test with the Mann Whitney U test, it is known that the value of Z-count = 1.879 is more than Z-critical = 1.645. This shows that the median concept understanding of students who follow learning with the PMR Approach is higher than the median concept understanding that follows regular learning. The average value of students' concept understanding in the class applying the PMR approach x ̅=62 was higher than the class that followed the usual learning where x ̅=53. Thus, it can be concluded that the understanding of mathematical concepts of students who participate in learning with the PMR approach is higher than the understanding of mathematical concepts of students who follow ordinary learning
Co-Authors Adi Suarman Situmorang, Adi Suarman Aruan, Anggie Desi K. Bancin, Resy Karina Christine Dakhi, Noferia Ellis Mardiana Panggabean Farasi, Dosni Roham Damai Setia Firman Pangaribuan Giawa*, Yulina Giawa, Sentosa Giawa, Yulina Gultom, Kristina Gultom, Limasso Gultom, Sanggam P Hia, Lutemaria Hutauruk, Agusmanto J.B Juraganda S, Chandra Saptanto Laia, Yunus Lena Rosdiana Pangaribuan Lubis, Mindo Juliani Kelly Lumban Toruan, Nia Natasha Luna Theresia Tamhunan M Simanjuntak, Ruth Manalu, Ayunasari Manik, Efron Manik, Jois Febri Marpaung, Melda Melina Siska Naibaho, Tutiarny Napitupulu, Eastman Ndruru, Marinus Pakpahan, Yurni Kristina Pangaribua, Firman Panggabean, Ellis M Panggabean, Ellis M. Pardosi, Monalisa Parsaulian, Benni Polin Pasaribu, Anita Sabrina Pasaribu, Mei Sartika purba, rIcky rikardo Rani Farida Sinaga Ritonga, Roy Ricardo Roulina, Roulina Rumapea, Lenni Santana Ruth Mayasari Simanjuntak Sembiring, Thresia Yohana Siagian, Rebeka br Sianturi, Esra Chatarina Sianturi, Krismawati Sihite, Epiphanias Br Sihite, Epiphanias Br. Sihombing, Artha Hadia Sihombing, Heldon Sihotang, Friska Ladista Silaban, Naomi Silangit, Menna Sri Ulina Simamora, Dinarti Simamora, Rona Marisa Simanjuntak, Ruth Simanjuntak, Ruth M Simanjuntak, Ruth M. Simanujuntak, Ruth M Simbolon, Lolyta Damora Sinaga, Agustina Mayen Rilen Sinaga, Lorinta Rupmahita Sinaga, Rianda sinaga, samuel juliardi Sitepu, Christina P Sitepu, Edi Petra Situmeang, Santi Yohana Tampubolon, Samto Rediwan Togatorop, Fresty Handayani Yunita Sinaga, Yunita Zagoto, Lidwina Shinta Zebua, Berliance Zamira