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All Journal AFORE: Jurnal Pendidikan Matematika Jurnal Pendidikan dan Sosial Humaniora
Brilyant Alvindo Sihombing
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Humanities Education Mathematics

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ANALISIS PEMAHAMAN SISWA SMA N1 PERCUT SEI TUAN TERHADAP KONSEP DASAR BARISAN DAN DERET Kairudin; Brilyant Alvindo Sihombing; Aldryanto Lumban Gaol; Martin A Hutauruk; Jhose R Siburian; Firman Satria Tafonao
Afore : Jurnal Pendidikan Matematika Vol 4 No 2 (2025): Afore : Jurnal Pendidikan Matematika
Publisher : Universitas Nias Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57094/afore.v4i2.3851

Abstract

This study aims to conduct an in-depth analysis of the level and profile of students’ understanding at SMA Negeri 1 Percut Sei Tuan regarding the fundamental concepts of Sequences and Series in mathematics learning. Conceptual understanding is a fundamental aspect of comprehensive mathematical mastery, as it not only involves the ability to apply formulas but also requires logical reasoning and comprehension of the relationships between concepts. Initial indications reveal a significant gap between students’ ability to use formulas mechanically and their deeper conceptual understanding. This research employs a Mixed Methods approach with an Exploratory Sequential design, beginning with the collection of quantitative data through written tests administered to 30 eleventh-grade science students (Class XI MIA), followed by semi-structured interviews with selected students to further explore their conceptual grasp. Quantitative analysis shows that approximately 70% of students were able to answer procedural questions—those solvable through direct formula application. However, only about 30% of students succeeded in solving more complex problems requiring deeper reasoning and conceptual understanding. The qualitative findings reinforce these results, indicating that students tend to memorize formulas without understanding their underlying meaning or origin, and often struggle to distinguish between the concepts of sequences and series. Therefore, a shift in instructional approach is needed, emphasizing exploration, conceptual discussion, and holistic understanding.
Analisis Kesalahan Mahasiswa dalam Menentukan Besar Sudut pada Bangun Datar Brilyant Alvindo Sihombing; Fithrah Amalia Sirait; Devita Syahputri; Dinda Rizky; Siti Aisyah Lubis; Novitasari Br Hutauruk; Muhammad Amin Fauzi
Khatulistiwa: Jurnal Pendidikan dan Sosial Humaniora Vol. 5 No. 1 (2025): Maret : Jurnal Pendidikan dan Sosial Humaniora
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/khatulistiwa.v5i1.5706

Abstract

This study aims to analyze the types of student errors in solving problems on determining the size of angles in flat shapes. The subjects of the study were students of the Mathematics Education Study Program, State University of Medan, academic year 2024/2025. Data were obtained through written tests and interviews with 10 students. The results of the study showed that the errors often made by students included conceptual errors (42%), procedural errors (38%), and computational errors (20%). Conceptual errors are mainly related to understanding the relationship between angles in triangles and supplementary angles, procedural errors are related to unsystematic solution steps, while computational errors are errors in making calculations. This study provides recommendations to improve students' conceptual understanding of angles and their relationships in flat shapes.
Co-Authors Aldryanto Lumban Gaol Devita Syahputri Dinda Rizky Firman Satria Tafonao Fithrah Amalia Sirait Jhose R Siburian Kairudin Martin A Hutauruk Muhammad Amin Fauzi Novitasari Br Hutauruk Siti Aisyah Lubis