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Kerdid Simbolon
Universitas Kristen Indonesia
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Journal : Brillo Journal

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Kesulitan Siswa dalam Memecahkan Masalah Barisan dan Deret Aritmatika Ayu Marida Silaban; Kerdid Simbolon; Jitu Halomoan Lumbantoruan
Brillo Journal Vol 1 No 2 (2022): Profil Kemampuan Pemecahan Masalah Matematis Siswa
Publisher : S&Co Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (194.713 KB) | DOI: 10.56773/bj.v1i2.14

Abstract

The purpose of this research is to analyze students' difficulties in problem-solving in arithmetic sequences and series. The subject of this research is a student at SMA HKBP Lintongnihuta. This research approach is descriptive quantitatively. The types of students' difficulties experienced were analyzed based on Polya's stages of problem-solving. The results of this research are three categories of students based on achievement scores, namely the low category with a percentage of 50%, the medium category with a percentage of 30%, and the high category with a percentage of 20%. There are 4 types of difficulties experienced by students, that is: (1) difficulty in understanding the problem with the number of students experiencing it as much as 28%, (2) students' difficulties in planning problem solving with the number of students experiencing it as much as 11%, (3) students' difficulties in carrying out the plan in problem-solving with the number of students experiencing it as much as 12%, and (4) difficulty in looking back at answers with the number of students experiencing it as much as 8%. The type of difficulty that most students experience is in understanding the problem.
Improving Mathematical Understanding on Geometry for 9th Grade Students through Three-Dimensional Mathematics Learning Media Based on Virtual Reality Simbolon, Kerdid; Ditasona, Candra; Setiawan, Laurencia Firstania
Brillo Journal Vol 4 No 1 (2024): Innovative Strategies to Enhance Mathematics Learning Effectively
Publisher : S&Co Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56773/bj.v4i1.71

Abstract

This study aimed to develop a three-dimensional virtual reality (VR)-based learning media for teaching mathematics at 9th grade students, focusing on improving students' understanding of geometric shapes. Utilizing the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model, the research involved the development of an interactive VR tool that allows students to engage with complex geometric concepts in an immersive environment. The VR media was validated by subject learning material experts in terms of content, language, and technical aspects, resulting in an overall validity score of 4.04, indicating high validity. Implementation quantitative analysis showed that the tool significantly improved student comprehension, with an average practicality score of 3.81, indicating that the media was easy to use in the classroom. This study concludes that VR-based learning media offers a promising approach to overcoming the difficulties students face in understanding three-dimensional geometry, providing both an engaging and effective learning experience.
Co-Authors Amos Kandola Ayu ArthaSari Beangelita Napitupulu Ayu Marida Silaban Candra Ditasona Daniel Dongan Parulian Siagian Ditasona, Candra Familia Novita Simanjuntak Jefry Samuel Lumbantoruan, Jitu Halomoan Manogari Sianturi Mega Suci Rahayuny Pascal Risma Uly Manalu, Risma Uly Santri Chintia Purba Setiawan, Laurencia Firstania Stevi Natalia Sunarto Sunarto Tan Hian Nio Tan Hian Nio Tugelida, Nel Bryan C