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All Journal Mandalika Mathematics and Educations Journal Journal of English Language and Education SCIENCE : Jurnal Inovasi Pendidikan Matematika dan IPA Education Achievement: Journal of Science and Research
Sihotang, Harry Marcel Wahyu
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Education Languange, Linguistic, Communication & Media Mathematics Other

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Penerapan Media Pembelajaran menggunakan Papan Peluang, Dadu, dan Multimedia Pembelajaran Interaktif dengan Pendekatan RME di SMA Swasta PAB 8 Saentis Percut Kairuddin, Kairuddin; Samosir, Martha Indah; Sitorus, Grace Elicia; Sihotang, Harry Marcel Wahyu; Tanjung, July Yanty
Mandalika Mathematics and Educations Journal Vol 6 No 2 (2024): Edisi Desember
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v6i2.7821

Abstract

This research aims to implement probability learning media based on Realistic Mathematics Education (RME) at SMA Swasta PAB 8 Saentis Percut. The problem addressed is students' difficulties in understanding the abstract and complex concept of probability. The method used is qualitative with a case study approach, involving observation, interviews, and student satisfaction surveys. The results show significant improvement in students' understanding of probability concepts, as well as increased motivation and active participation in learning. In conclusion, RME-based learning media effectively helps students contextualize and apply probability, enhancing engagement and facilitating deeper understanding.
ANALISIS MISKONSEPSI MAHASISWA DALAM MENYELESAIKAN SOAL SUPREMUM DAN INFIMUM BERDASARKAN TEORI NEWMAN Sihotang, Harry Marcel Wahyu; Sitindaon, David Micle; Saing, Nasib Maruli Tua; Silalahi, Lisbeth Grace Luciana; Sinaga, Debora; Simanullang, Michael Christian
SCIENCE : Jurnal Inovasi Pendidikan Matematika dan IPA Vol. 5 No. 2 (2025)
Publisher : Pusat Pengembangan Pendidikan dan Penelitian Indonesia (P4I)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51878/science.v5i2.5090

Abstract

This study aims to analyze students' misconceptions in solving problems related to the concepts of supremum and infimum in Real Analysis courses. These concepts are fundamental in mathematics, yet many students struggle to understand and apply them correctly. Using a qualitative approach and Newman’s Error Analysis theory, this research identifies the stages of errors made by 8 Mathematics Education students at Universitas Negeri Medan through a written test consisting of three problems. Data were descriptively analyzed based on Newman’s five error stages: reading error, comprehension error, transformation error, process skill error, and encoding error. The results reveal that the most dominant errors occur at the comprehension stage, where students frequently confuse supremum/infimum with maximum/minimum values. Transformation and process skill errors were also significant, particularly in problem modeling and computational operations, while encoding errors reflected inaccuracies in presenting final answers. These findings highlight the need for teaching strategies that emphasize conceptual understanding, in-depth discussions, and visualization tools. Adaptive scaffolding and intensive practice are recommended to address student misconceptions. This study contributes to the development of more effective Real Analysis teaching methods and opens opportunities for further error-diagnosis-based research. ABSTRAKPenelitian ini bertujuan untuk menganalisis miskonsepsi mahasiswa dalam menyelesaikan soal-soal terkait konsep supremum dan infimum pada mata kuliah Analisis Real. Konsep ini merupakan fondasi penting dalam matematika, namun banyak mahasiswa mengalami kesulitan dalam memahami dan menerapkannya secara tepat. Studi kualitatif ini menggunakan teori Analisis Kesalahan Newman untuk mengidentifikasi tahapan kesalahan yang dilakukan oleh 8 mahasiswa Program Studi Pendidikan Matematika Universitas Negeri Medan melalui tes tertulis yang mencakup tiga soal. Data dianalisis secara deskriptif berdasarkan lima tahapan kesalahan Newman, yaitu reading error, comprehension error, transformation error, process skill error, dan encoding error. Hasil penelitian menunjukkan bahwa kesalahan paling dominan terjadi pada tahap pemahaman (comprehension error), di mana mahasiswa sering keliru membedakan supremum/infimum dengan nilai maksimum/minimum. Kesalahan transformasi (transformation error) dan proses penyelesaian (process skill error) juga signifikan, terutama dalam memodelkan soal dan melakukan operasi perhitungan, sementara kesalahan pengkodean (encoding error) mencerminkan ketidaktepatan dalam menyajikan jawaban akhir. Temuan ini mengindikasikan perlunya pendekatan pembelajaran yang menekankan pemahaman konseptual, diskusi mendalam, dan penggunaan alat visualisasi. Strategi seperti scaffolding adaptif dan latihan intensif direkomendasikan untuk memperbaiki miskonsepsi mahasiswa. Penelitian ini memberikan kontribusi bagi pengembangan metode pembelajaran Analisis Real yang lebih efektif serta membuka peluang penelitian lanjutan berbasis diagnosis kesalahan.
Analysis of Reading and Writing Skills on the Ability to Solve Math Story Problems of Junior High School Students in Saribudolok Purba, Fernando; Sihotang, Harry Marcel Wahyu; Sukma, Mentari; Tarigan, Nafa Cleo Wulandari; Sarah, Siti; Sihombing, Thresia Veronika; Prasasti, Tri Indah
Education Achievement: Journal of Science and Research Volume 5 Issue 2 July 2024
Publisher : Pusdikra-Publishing.com

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51178/jsr.v5i2.1870

Abstract

This study aims to analyze the relationship between reading and writing skills and students' ability to solve mathematical problems in the form of stories. The research participants consisted of six ninth grade junior high school students who were grouped based on their average daily math test scores, referring to the Minimum Completion Criteria (KKM). The research method applied was qualitative description. The data sources included test results, observations and interviews. The mathematical literacy test consisted of six questions that followed the PISA mathematical literacy indicators. The test results showed variations in students' ability to solve math problems, especially chance problems. Most students were able to solve routine problems (level 1), interpret problems (level 2), and use problem solving strategies (level 3). However, they face difficulties in problems that require the integration of different representations with concrete situations (level 4). An analysis of the test results showed that the group of students with higher score categories tended to be better at answering the questions. These results show the importance of reading and writing skills in improving students' ability to understand and solve math story problems.
Analysis of Student Satisfaction with Facilities and Infrastructure at the Dormitory of Universitas Negeri Medan: A Quantitative Descriptive Approach Sihotang, Harry Marcel Wahyu; Manullang, Juliana Citra; Sagala, Prihatin Ningsih; Turnip, Leonardo; Sitorus, Tabhita Yolanda; Lubis, Nazwa Indri
Journal of English Language and Education Vol 10, No 2 (2025)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jele.v10i2.802

Abstract

This study aims to evaluate the level of student satisfaction with the facilities and infrastructure available at the Medan State University (Unimed) Dormitory. Adequate facilities have an important role in creating a comfortable learning environment and supporting academic productivity. This research uses a descriptive quantitative approach through a survey method, by distributing questionnaires to 23 respondents who are dormitory residents. The results of the analysis show that the level of student satisfaction with dormitory facilities varies. The security and comfort aspects of the study rooms received positive responses, while the availability of water, bathroom cleanliness, and the quality of the internet network are still factors that cause dissatisfaction. Although most respondents expressed satisfaction with the general cleanliness of the dormitories, improvements are still needed in terms of management services, facility maintenance, and the development of supporting infrastructure. The conclusion of this study shows that although some aspects of the facilities have met the standards, improvements are still needed in the management of facilities and infrastructure to increase student satisfaction. Improving the quality of facilities is expected to create a dormitory atmosphere that is safer, more comfortable, and conducive to the continuity of the student academic process.
Co-Authors Debora Sinaga, Debora Kairuddin . Lubis, Nazwa Indri Manullang, Juliana Citra Michael Christian Simanullang Prihatin Ningsih Sagala Purba, Fernando Saing, Nasib Maruli Tua Samosir, Martha Indah Sihombing, Thresia Veronika Silalahi, Lisbeth Grace Luciana Siti Sarah, Siti Sitindaon, David Micle Sitorus, Grace Elicia Sitorus, Tabhita Yolanda Sukma, Mentari Tanjung, July Yanty Tarigan, Nafa Cleo Wulandari Tri Indah Prasasti Turnip, Leonardo