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All Journal Journal on Mathematics Education (JME) Al-Jabar : Jurnal Pendidikan Matematika EKSAKTA : Jurnal Penelitian dan Pembelajaran MIPA JURNAL EKSAKTA PENDIDIKAN (JEP) AXIOM : Jurnal Pendidikan dan Matematika Vygotsky: Jurnal Pendidikan Matematika dan Matematika PHI: Jurnal Pendidikan Matematika Innovative: Journal Of Social Science Research International Journal of Trends in Mathematics Education Research (IJTMER)
Elvis Napitupulu, Elvis
State University of Medan, Medan
Agriculture, Biological Sciences & Forestry Humanities Chemistry Computer Science & IT Education Law, Crime, Criminology & Criminal Justice Mathematics Physics Public Health Other

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MATHEMATICAL UNDERSTANDING AND REPRESENTATION ABILITY OF PUBLIC JUNIOR HIGH SCHOOL IN NORTH SUMATRA Minarni, Ani; Napitupulu, Elvis; Husein, Rahmad
Journal on Mathematics Education Vol 7, No 1 (2016)
Publisher : Department of Doctoral Program on Mathematics Education, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1038.501 KB) | DOI: 10.22342/jme.7.1.2816.43-56

Abstract

This paper is the result of first phase of the research about the development of students’ mathematical understanding and representation ability through Joyful Problem-based Learning (JPBL) at Public Junior High School in North Sumatera, Indonesia. The population is all of the students of public junior high school (PJHS) in North Sumatera. Samples choose based on stratified random sampling. The samples are the students of PJHS 27 Medan, PJHS 1 Percut Sei Tuan, PJHS 1 Tebing Tinggi, and PJHS 2 Pematangsiantar. The techniques used for collecting data is observation, interview, and essay test. The research findings: (1) Based on interview and observation found that conventional approach still use in all of the class of PJHS; The students engagement in learning activity is very low as well as students self-regulated learning; Most of the students do not attain minimal mastery achievement, (2) Based on essay test found that achievement of the students in mathematical understanding and representation test is categories low.Keywords: mathematical understanding, mathematical representation, joyful problem-based learning DOI: http://dx.doi.org/10.22342/jme.7.1.2816.43-56
E-Module for Problem-Based Learning Integrating Batak Toba Culture (PBL BTC) to Improve Problem-Solving Ability simangunsong, ita pratiwi; Napitupulu, Elvis; Lubis, Asrin; simangunsong, ika trisni
Vygotsky: Jurnal Pendidikan Matematika dan Matematika Vol. 6 No. 2 (2024): Vygotsky: Jurnal Pendidikan Matematika dan Matematika
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/voj.v6i2.1038

Abstract

This research aims to analyze: 1) the validity, practicality and effectiveness of the PBL e-module based on Batak Toba Culture (PBL BTC) which was developed to increase students' problem-solving abilities at SMP Negeri 1 Simanindo; 2) increasing students' problem-solving abilities through the developed e-module. This research is using the ADDIE. From the tested of class IX 2 was obtained: 1) the PBL BTC e-module have the criteria of being valid, effective, and practical; 2) Increased problem-solving abilities using the PBL BTC e-module as seen from the N-gain value is 0.506, it is in the "medium" category. This research recommendations might be made the E-Module with mathematical problem-solving tasks on the topic of congruency should be continued for future effectiveness evaluations.
Pengembangan Website Dengan Algoritma K-Nearest Neighbor (KNN ) Dalam Klasifikasi Perkembangan Prestasi Siswa Terhadap Hasil Belajar (Studi Kasus SD Negeri 107396 Paluh Merbau) Siburian, Rulli Prasetio Bane; Refisis, Nice Rejoice; Rangkuti, Yulita Molliq; Napitupulu, Elvis; AI Idrus, Said Iskandar
Innovative: Journal Of Social Science Research Vol. 4 No. 5 (2024): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v4i5.12832

Abstract

Pemahaman perkembangan intelektual anak di SD sangat penting sebagai acuan pendidikan. SD Negeri 107396 Paluh Merbau, yang masih menggunakan metode manual untuk mengklasifikasikan nilai siswa, menjadi tempat ideal untuk penelitian ini. Tujuan penelitian adalah menganalisis efektivitas algoritma K-Nearest Neighbor (KNN) dalam klasifikasi perkembangan siswa berdasarkan hasil belajar dan membangun website sebagai platform pengumpulan data dan implementasi KNN. Prestasi siswa diukur melalui nilai ujian semester, ujian harian, tugas, sikap, dan absensi. Data dikumpulkan secara dokumenter dan dianalisis dengan mengurutkan jarak data uji ke data latih dari yang terkecil hingga terbesar, menggunakan k=1 hingga k=10. Hasil klasifikasi mayoritas menunjukkan prestasi Rafa Rifa'i berada di kategori kelas 0 (di bawah rata-rata). Penelitian ini menunjukkan bahwa algoritma KNN efektif dalam klasifikasi prestasi siswa, memberikan wawasan untuk meningkatkan strategi pembelajaran.
PENGARUH MODEL PEMBELAJARAN KOOPERATIF TIPE STAD TERHADAP HASIL BELAJAR MATEMATIKA DAN KERJASAMA SISWA KELAS IX SMP Mafa, Rizki Ramadhan; Napitupulu, Elvis
PHI: Jurnal Pendidikan Matematika Vol 8, No 2 (2024): Oktober, 2024
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/phi.v8i2.415

Abstract

Tujuan dalam penelitian ini guna mengetahui hasil belajar matematika dan kerjasama siswa yang diajar menggunakan model pembelajaran Kooperatif tipe STAD lebih baik dari pada yang diajar menggunakan pembelajaran Konvensional pada Kelas IX SMP Muhammadiyah 43 Kabanjahe. Metode penelitian yang digunakan adalah metode quasi eksperimen atau eksperimen semu. Sampel dalam penelitian ini adalah siswa kelas IX di SMP Muhammadiyah 43 Kabanjahe T.P 2023-2024 dipilih sampel sebanyak dua kelas, yaitu siswa kelas IX-2 sebanyak 17 siswa sebagai kelas kontrol dan siswa kelas IX-1 sebanyak 17 siswa sebagai kelas eksperimen. Metode pengambilan sampel menggunakan total sampling. Pada penelitian ini data yang diolah adalah hasil belajar dan kerjasama siswa kelas IX SMP. Dengan menggunakan rumus uji-t, analisis uji-t dilakukan sebagai metode analisis data. Dari hasil penelitian rata-rata posttest kedua kelas dengan menggunakan membandingkan hasilnya didapatkan hasil kelas eksperimen yaitu sebesar 77,88 dan kelas kontrol sebesar 73,94 diperoleh sebuah kesimpulan bahwa hasil belajar matematika dan kerjasama siswa yang diajar menggunakan Model Pembelajaran Kooperatif Tipe STAD lebih baik dari model pembelajaran Konvensional pada Siswa Kelas IX SMP Muhammadiyah 43 Kabanjahe tahun ajar 2023/2024.
THE DIFFERENCE OF STUDENTS’ MATHEMATICS LEARNING OUTCOMES TAUGHT BY THINK-PAIR-SHARE AND NUMBERED HEADS TOGETHER MODELS Hasugian, Krisna Junifer; Napitupulu, Elvis
PHI: Jurnal Pendidikan Matematika Vol 8, No 2 (2024): Oktober, 2024
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/phi.v8i2.416

Abstract

The research aims to examine the variance in students' mathematics when instructed use the Think-Pair-Share and Numbered Heads Together models. The study's population comprises all eighth-grade students at SMP Parulian 1 Medan. Two classes were selected from this population for experimental research, each receiving different treatments: Class VIII-3 as Experimental Group II, taught using the Numbered Heads Together (NHT) model, and Class VIII-2 as the sample group, Experimental Group I, instructed using the Think-Pair-Share (TPS) model. Based on the research findings and discussions outlined in the previous chapter, it can be concluded that: The average score of Experimental Group I surpasses that of Experimental Group II, with the posttest average of Experimental Group I amounting to 81.41 while Experimental Group II scored 75.87. Hypothesis testing is thitung = 2.383 > ttabel =1.99962, thus accepting Ha and rejecting H0. Hence, it can be concluded that students' mathematics learning outcomes using the Think-Pair-Share model are higher than using the Numbered Heads Together model.
The Ethnomathematics in Enhancing Communication Skills among Elementary School Students Hilliyani, Hilliyani; Saragih, Sahat; Napitupulu, Elvis
International Journal of Trends in Mathematics Education Research Vol 7, No 2 (2024)
Publisher : SAINTIS Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33122/ijtmer.v7i2.354

Abstract

Learning mathematics in primary schools often faces challenges in making abstract concepts easier for students to understand. One approach that can address this challenge is ethnomathematics, which integrates elements of local culture into mathematics learning. This research aims to explore how ethnomathematics can be used to improve mathematical communication understanding in primary school students. The research method used is to use a literature review of various sources that examine the importance of training primary school children's communication in mathematics. Ethnomathematics can improve students' understanding of mathematical concepts through a cultural context that is familiar to them. This approach is also effective in training mathematical communication, where students learn to explain their thought processes, discuss with peers, and solve mathematical problems collaboratively. Students who learnt with the ethnomathematics approach showed improved mathematical communication skills, both orally and in writing. The importance of applying ethnomathematics lies in its ability to make mathematics more interesting and meaningful to students, thus increasing their motivation and active participation in learning. In addition, ethnomathematics also encourages the development of critical and creative thinking skills, which are essential in mathematical communication. Although its implementation requires teacher creativity and preparedness, these findings confirm that ethnomathematics is an important and effective approach in mathematics education in primary schools.
PERBEDAAN KEMAMPUAN PENYELESAIAN MASALAH MATEMATIS SISWA YANG DIAJAR MENGGUNAKAN MODEL PEMBELAJARAN TEAMS GAMES TOURNAMENT DAN NUMBERED HEAD TOGETHER BERBANTUAN VIDEOSCRIBE Ginting, Vischa BR.; Napitupulu, Elvis
Eksakta : Jurnal Penelitian dan Pembelajaran MIPA Vol 10, No 1 (2025): Eksakta : Jurnal Penelitian dan Pembelajaran MIPA
Publisher : Fakultas Keguruan Dan Ilmu Pendidikan, UM-Tapsel

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/eksakta.v10i1.175-181

Abstract

Penelitian ini bertujuan untuk membandingkan kemampuan pemecahan masalah matematis siswa yang diajarkan dengan model pembelajaran kooperatif Numbered Heads Together (NHT) dan Teams-Games-Tournaments (TGT) di SMP Negeri 3 Percut Sei Tuan. Penelitian ini menggunakan desain eksperimen semu dengan sampel siswa kelas VIII-5 dan VIII-6 sebanyak 72 siswa. Instrumen yang digunakan adalah tes Pengetahuan Awal Matematika (PAM) dan tes Kemampuan Pemecahan Masalah Matematis. Uji normalitas dan homogenitas menunjukkan bahwa data berdistribusi normal dan homogen. Hasil analisis menunjukkan rata rata nilai tes Kemampuan Pemecahan Masalah Matematis siswa yang diajar dengan model Numbered Heads Together adalah 80,91 dengan simpangan baku 5,31, sementara siswa yang diajar dengan model Teams-Games-Tournaments memiliki nilai rata-rata 77,3 dengan simpangan baku 6,9. Uji hipotesis menggunakan uji t 3 104 34 61 menghasilkan ????ℎ???????????????????? = 2,48 yang lebih besar dari ???????????????????????? = 1,66 sehingga ????0 ditolak. Ini berarti siswa yang diajarkan dengan model Numbered Heads Together memiliki kemampuan pemecahan masalah matematis yang lebih baik dibandingkan dengan model Teams-Games-Tournaments. Penelitian ini menyarankan agar guru menggunakan model Numbered Heads Together untuk meningkatkan kemampuan pemecahan masalah matematis siswa dan memberikan perhatian lebih dalam proses belajar kooperatif. Penelitian lanjutan diharapkan dapat mengeksplorasi efektivitas model ini di jenjang pendidikan yang lebih tinggi. 
A comparison of computational thinking skills: PBL model vs traditional learning Simanjuntak, Erlinawaty; Saragih, Sahat; Napitupulu, Elvis
AXIOM : Jurnal Pendidikan dan Matematika Vol 14, No 1 (2025)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/axiom.v14i1.13660

Abstract

Computational thinking abilities assist students in solving complex problems, enhancing productivity, and preparing them to face challenges in various fields. The problem-based learning (PBL) model was chosen because it is believed to improve students' computational thinking skills, as well as their critical and creative thinking abilities, which are often difficult to achieve through conventional learning. This research aims to determine the differences in students' computational thinking abilities through the application of problem-based learning and traditional learning methods. The research method was an experiment involving a population of all 2020 Mathematics Education students who took six linear program courses at Medan State University. Sampling was conducted using a random sampling technique, focusing on the PSPM 20B and PSPM 20C classes, totaling 60 students. This study employed a pretest–posttest control group design. Results from previous research indicated that the average computational thinking ability of students in the experimental class was higher than that of the control class, with scores of 82.67 for the experimental class and 69.00 for the control class. From the results of the average difference test, it can be concluded that there is a significant difference in the computational thinking abilities of students taught using the problem-based learning model compared to those taught using the traditional learning model, with PBL being more effective.
Factors Affecting Mathematical Creative Thinking Ability: A Systematic Review and Multidimensional Perspective Br Ginting, Siti Salamah; Armanto, Dian; Amry, Zul; Dewi, Izwita; Napitupulu, Elvis
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 9 No 1 (2025): JEP (Jurnal Eksakta Pendidikan)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jep/vol9-iss1/949

Abstract

The ability to think creatively mathematically, defined as the capacity to generate novel, diverse, and valuable mathematical ideas or solutions to problems with fluency, flexibility, originality, and elaboration, is a crucial skill in facing the challenges of the 21st century. However, a comprehensive understanding of the influencing factors is still limited. This systematic review aims to integrate and synthesize current research on factors influencing mathematical creative thinking abilities from a multidimensional perspective. A systematic search method was conducted on the Scopus database for studies published between 2019 and 2024. The results show the complexity of interactions between cognitive (thinking style, analogical reasoning, computational thinking), affective (self-efficacy, attitudes towards mathematics, self-regulated learning), and contextual (learning approaches, technology integration, background) factors from the 31 articles analyzed. cultural background) in influencing mathematical creativity. The analysis also revealed differences in influencing factors between levels of education from junior high school to college. These results stress how important it is to look at math creativity as a whole. They also have important implications for how math is taught and for future research, such as the need for longitudinal studies and the creation of integrative theoretical models
Students talk about difficulties they have in solving math problems Wahyuni, Wahyuni; Zaiyar, M; Mazlan, Mazlan; Saragih, Sahat; Napitupulu, Elvis
Al-Jabar: Jurnal Pendidikan Matematika Vol 14 No 1 (2023): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v14i1.16910

Abstract

The ability to solve students' mathematical problems cannot be diagnosed clearly just by using test questions; it must also be seen by looking at students' responses to the problem-solving process. As a result, the purpose of this study is to investigate students' mathematical problem-solving skill as well as their responses to the problem-solving process. This study is descriptive-qualitative in nature. Three junior high schools (SMP) in Aceh participated in this study, with 76 class VIII students serving as research subjects. Tests, observations, and interviews were used as data collection techniques. Quantitative data were descriptively analyzed using proportions, while qualitative data were descriptively analyzed using coding. The results showed that 25 percent of students wrote down what was known and asked, which was an indication of problem comprehension; 21 percent of students were able to devise problem-solving strategies; and 15 percent of students had done calculations correctly. correct, 11 percent of students checked their answers again. Based on the responses given by students, there were some difficulties experienced by students when solving math problems, namely difficulty understanding reading texts, using mathematical terms, making problem connections, making decisions, uncertainty in solving problems, time, carelessness, and boredom. The findings of this study are expected to serve as a resource for teachers and education practitioners in developing focus, discipline, and patience in problem solving and selecting learning models appropriate to the needs of their students.
Co-Authors Amry, Zul Ani Minarni Asrin Lubis Dian Armanto Ginting, Vischa BR. Hasugian, Krisna Junifer Hilliyani, Hilliyani Ika Trisni Simangunsong Izwita Dewi Mafa, Rizki Ramadhan Mazlan, Mazlan Rahmad Husein Refisis, Nice Rejoice Sahat Saragih Said . Iskandar Siburian, Rulli Prasetio Bane simangunsong, ita pratiwi Simanjuntak, Erlinawaty Siti Salamah Br Ginting wahyuni wahyuni Yulita Molliq Rangkuti Zaiyar, M