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All Journal AFORE: Jurnal Pendidikan Matematika RESLAJ: Religion Education Social Laa Roiba Journal
Firman Satria Tafonao
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Religion Economics, Econometrics & Finance Education Environmental Science Mathematics Social Sciences

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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 Geometri: Studi pada Pemahaman Sudut dalam Garis Sejajar Annisa Saktiono; Agnia Kamila Rambe; Syifani Azzura; Jona Mikhael Hutagaol; Firman Satria Tafonao; Kms. Muhammad Amin Fauzi
Reslaj: Religion Education Social Laa Roiba Journal Vol. 7 No. 5 (2025): RESLAJ: Religion Education Social Laa Roiba Journal
Publisher : Intitut Agama Islam Nasional Laa Roiba Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47467/reslaj.v7i5.7448

Abstract

This study aims to analyze the types of mistakes made by students in understanding the concept of angles on parallel lines and the factors that cause them. The approach used in this study is qualitative with a descriptive design, which allows the researcher to dig deeply into the pattern of errors that occur. The research subjects consisted of seven students who were selected using the purposive sampling technique based on certain criteria. Data collection is carried out through diagnostic tests that include various types of angles, such as facing angles, opposite inside corners, and unilateral inside angles. The results of the study show that student errors can be classified into four categories according to Soedjadi (in Ananda, dkk 2018), namely factual errors, conceptual errors, principle errors, and operational errors.
Co-Authors Agnia Kamila Rambe Aldryanto Lumban Gaol Annisa Saktiono Brilyant Alvindo Sihombing Jhose R Siburian Jona Mikhael Hutagaol Kairudin KMS. Muhammad Amin Fauzi Martin A Hutauruk Syifani Azzura