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<![CDATA[Penerapan Pendekatan Matematika Realistik (PMR) pada Materi Trigonometri untuk Meningkatkan Pemahaman Konsep ]]>
<![CDATA[Lubis, Mindo Juliani Kelly]]>;
<![CDATA[Panggabean, Ellis Mardiana]]>;
<![CDATA[Tambunan, Hardi]]>
<![CDATA[ Indo-MathEdu Intellectuals Journal Vol. 6 No. 1 (2025): Indo-MathEdu Intellectuals Journal ]]>
Publisher : <![CDATA[Lembaga Intelektual Muda (LIM) Maluku ]]>
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DOI: 10.54373/imeij.v6i1.2743
<![CDATA[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]]>
<![CDATA[Kesulitan Membedakan Soal Cerita FPB Dengan KPK pada Siswa Tingkat Sekolah Menengah Pertama ]]>
<![CDATA[Pasaribu, Anita Sabrina]]>;
<![CDATA[Panggabean, Ellis M.]]>;
<![CDATA[Tambunan, Hardi]]>
<![CDATA[ Indo-MathEdu Intellectuals Journal Vol. 6 No. 2 (2025): Indo-MathEdu Intellectuals Journal (In-Press) ]]>
Publisher : <![CDATA[Lembaga Intelektual Muda (LIM) Maluku ]]>
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DOI: 10.54373/imeij.v6i2.2794
<![CDATA[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]]>
<![CDATA[Kesulitan Membedakan Soal Cerita FPB Dengan KPK pada Siswa Tingkat Sekolah Menengah Pertama ]]>
<![CDATA[Pasaribu, Anita Sabrina]]>;
<![CDATA[Panggabean, Ellis M.]]>;
<![CDATA[Tambunan, Hardi]]>
<![CDATA[ Indo-MathEdu Intellectuals Journal Vol. 6 No. 2 (2025): Indo-MathEdu Intellectuals Journal ]]>
Publisher : <![CDATA[Lembaga Intelektual Muda (LIM) Maluku ]]>
Show Abstract
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DOI: 10.54373/imeij.v6i2.2794
<![CDATA[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]]>
<![CDATA[Eksplorasi Alat Musik Angklung Terhadap Konsep Tabung ]]>
<![CDATA[Simamora, Rona Marisa]]>;
<![CDATA[Tambunan, Hardi]]>;
<![CDATA[Simanjuntak, Ruth Mayasari]]>
<![CDATA[ Indo-MathEdu Intellectuals Journal Vol. 6 No. 5 (2025): Indo-MathEdu Intellectuals Journal ]]>
Publisher : <![CDATA[Lembaga Intelektual Muda (LIM) Maluku ]]>
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DOI: 10.54373/imeij.v6i5.4099
<![CDATA[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.]]>
<![CDATA[Eksplorasi Alat Musik Keteng-Keteng Terhadap Bangun Ruang Sisi Lengkung Tabung ]]>
<![CDATA[Sitepu, Edi Petra]]>;
<![CDATA[Tambunan, Hardi]]>;
<![CDATA[Simanjuntak, Ruth Mayasari]]>
<![CDATA[ Indo-MathEdu Intellectuals Journal Vol. 6 No. 5 (2025): Indo-MathEdu Intellectuals Journal ]]>
Publisher : <![CDATA[Lembaga Intelektual Muda (LIM) Maluku ]]>
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DOI: 10.54373/imeij.v6i5.4116
<![CDATA[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.]]>
<![CDATA[Penerapan Pendekatan Matematika Realistik (PMR) pada Materi Trigonometri untuk Meningkatkan Pemahaman Konsep ]]>
<![CDATA[Lubis, Mindo Juliani Kelly]]>;
<![CDATA[Panggabean, Ellis Mardiana]]>;
<![CDATA[Tambunan, Hardi]]>
<![CDATA[ Indo-MathEdu Intellectuals Journal Vol. 6 No. 1 (2025): Indo-MathEdu Intellectuals Journal ]]>
Publisher : <![CDATA[Lembaga Intelektual Muda (LIM) Maluku ]]>
Show Abstract
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DOI: 10.54373/imeij.v6i1.2743
<![CDATA[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]]>
<![CDATA[Pembelajaran Berbasis Projek Terhadap Kemampuan Pemahaman Konsep Siswa pada Materi Bangun Ruang Tabung di SMP ]]>
<![CDATA[Simamora, Rona Marisa]]>;
<![CDATA[Tambunan, Hardi]]>;
<![CDATA[Pangaribuan, Firman]]>
<![CDATA[ Indo-MathEdu Intellectuals Journal Vol. 7 No. 1 (2026): Indo-MathEdu Intellectuals Journal ]]>
Publisher : <![CDATA[Lembaga Intelektual Muda (LIM) Maluku ]]>
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DOI: 10.54373/imeij.v7i1.5129
<![CDATA[This study aims to determine the effect of project-based learning on students' conceptual understanding abilities in the topic of cylindrical three-dimensional shapes in junior high school. The type of research used is quasi-experimental with a pretest-posttest control group design. The research subjects consisted of 64 students, divided into an experimental class and a control class, each comprising 32 students. The research instrument was a conceptual understanding ability test consisting of essay questions. The data were analysed using the Shapiro-Wilk normality test, Levene's Test for homogeneity, and the independent two-sample t-test. The results showed that the posttest data of both classes were normally distributed and had homogeneous variances. The t-test indicated a significant difference between the conceptual understanding abilities of students in the experimental and control classes (Sig. = 0.006 < 0.05), with the experimental class posttest mean being higher. This indicates that project-based learning is effective in enhancing students' conceptual understanding skills. Project-based learning provides contextual learning experiences, encourages active student engagement, and strengthens meaningful understanding of mathematical concepts.]]>
<![CDATA[Eksplorasi Pemanfaatan Alat Musik Keteng-Keteng Sebagai Media Pembelajaran Bangun Ruang Sisi Lengkung Tabung di Kelas IX SMP ]]>
<![CDATA[Sitepu, Edi Petra]]>;
<![CDATA[Tambunan, Hardi]]>;
<![CDATA[Pangaribuan, Firman]]>
<![CDATA[ Indo-MathEdu Intellectuals Journal Vol. 7 No. 1 (2026): Indo-MathEdu Intellectuals Journal ]]>
Publisher : <![CDATA[Lembaga Intelektual Muda (LIM) Maluku ]]>
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DOI: 10.54373/imeij.v7i1.5134
<![CDATA[This study aims to describe the use of keteng-keteng musical instruments as a medium for teaching mathematics on the subject of curved tube shapes in ninth grade junior high school. The study uses a descriptive qualitative approach with ninth grade junior high school students as the research subjects. Data collection was carried out through observation of the learning process, interviews with students and teachers, and documentation of learning activities. Data analysis was carried out through the stages of data reduction, data presentation, and conclusion drawing using triangulation techniques to maintain data validity. The results showed that the use of keteng-keteng musical instruments helped students understand the concept of cylinders more concretely through direct observation of the shape, elements, and characteristics of cylinders. In addition, the use of this locally-based media was able to increase student engagement, interest in learning, and activity in the mathematics learning process. Thus, the keteng-keteng musical instrument can be used as an alternative contextual and meaningful learning media for mathematics in the subject of curved tube shapes. ]]>
<![CDATA[Pengaruh Penerapan Pembelajaran Mendalam (Deep Learning) Terhadap Kemampuan Berfikir Kritis Siswa pada Pembelajaran Matematika di Kelas XI SMA ]]>
<![CDATA[Damanik, Friska Dewi Trymidawati]]>;
<![CDATA[Tambunan, Hardi]]>;
<![CDATA[Pangaribuan, Firman]]>
<![CDATA[ Indo-MathEdu Intellectuals Journal Vol. 7 No. 1 (2026): Indo-MathEdu Intellectuals Journal ]]>
Publisher : <![CDATA[Lembaga Intelektual Muda (LIM) Maluku ]]>
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DOI: 10.54373/imeij.v7i1.5156
<![CDATA[This study aims to analyze the effect of deep learning on students' critical thinking skills in mathematics learning in grade XI high school. This study uses a quantitative approach with a quasi-experimental design involving one experimental class and one control class. Deep learning treatment was given to the experimental class, while the control class followed conventional learning. Data on critical thinking skills were collected through a validated posttest. Data analysis was performed using the Shapiro–Wilk test to test normality, the Levene test to test homogeneity, and the independent samples t-test to test the difference in means between the two groups. The results of the analysis showed a significance value of 0.000, which is less than 0.05, indicating a significant difference between the critical thinking skills of students in the experimental class and the control class. These findings indicate that deep learning has a positive and significant effect on improving students' critical thinking skills in mathematics learning.]]>
<![CDATA[Implementasi Modul Pembelajaran Berbasis PjBL Terhadap Kemampuan Berfikir Kreatif Siswa pada Materi Bangun Ruang Melalui Pembuatan Miniatur Bangunan Adat Batak Toba di SMP ]]>
<![CDATA[Hutapea, Jernyta Futri Agustina Br.]]>;
<![CDATA[Tambunan, Hardi]]>;
<![CDATA[Pangaribuan, Firman]]>
<![CDATA[ Indo-MathEdu Intellectuals Journal Vol. 7 No. 2 (2026): Indo-MathEdu Intellectuals Journal (In-Press) ]]>
Publisher : <![CDATA[Lembaga Intelektual Muda (LIM) Maluku ]]>
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DOI: 10.54373/imeij.v7i2.5176
<![CDATA[This study aims to determine the effect of implementing a Project Based Learning (PjBL) based learning module on students' creative thinking abilities in solid geometry material through the creation of a Batak Toba traditional building miniature in junior high school. This study uses a quantitative approach with a quasi-experimental design of the non-equivalent control group type. The research sample consisted of two classes, namely the experimental class that received treatment using the PjBL-based module and the control class that used conventional learning. Data collection techniques were conducted through pretests and posttests using mathematical creative thinking ability test instruments referring to indicators of fluency, flexibility, originality, and elaboration. Data were analysed through normality tests, homogeneity tests, and Independent Sample t-Test. The results show that the data are normally distributed and homogeneous. The hypothesis test obtained a significance value of 0.000 (< 0.05), indicating a significant difference between the creative thinking abilities of students in the experimental and control classes. Thus, the implementation of the PjBL-based learning module through a Batak Toba traditional building miniature project has proven effective in enhancing the mathematical creative thinking abilities of junior high school students]]>
