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All Journal Ideguru: Jurnal Karya Ilmiah Guru
Ratna Natalia Mendrofa
Universitas Nias, Gunungsitoli, Sumatera Utara
Education Other

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Pengaruh Disposisi Matematis terhadap Kemampuan Pemecahan Masalah dengan Pembelajaran Berbantuan Video Ratna Natalia Mendrofa; Hasratuddin Hasratuddin; Bornok Sinaga
Ideguru: Jurnal Karya Ilmiah Guru Vol. 9 No. 3 (2024): Edisi September 2024
Publisher : Dinas Pendidikan, Pemuda dan Olahraga Daerah Istimewa Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51169/ideguru.v9i3.1218

Abstract

This study aims to describe the influence of mathematical disposition on problem-solving ability through video-assisted learning in seventh-grade mathematics at a junior high school in Gunungsitoli City. The research employed a quasi-experimental design, with class VII-A as the experimental group (n = 32) receiving video-assisted instruction and class VII-B as the control group (n = 32) using conventional methods. Data were collected through problem-solving ability tests and mathematical disposition questionnaires, administered as pre-tests and post-tests. Analysis was conducted using t-tests and linear regression analysis. Results showed a significant improvement in problem-solving ability in the experimental class compared to the control class, with gain scores of 0.50 and 0.25 respectively. For problem-solving ability, the experimental class improved from a pre-test average of 67.34 to a post-test average of 83.78, while the control class improved from a pre-test average of 66.22 to a post-test average of 73.84. The mathematical disposition analysis yielded scores of 79.31 for the experimental class and 72.06 for the control class. Findings indicate that students who participated in video-assisted learning demonstrated significant improvement in problem-solving ability compared to the control group. Furthermore, students' mathematical disposition positively correlated with this improvement. This suggests that the video-assisted learning approach has potential in facilitating the development of mathematical problem-solving skills, while acknowledging the role of mathematical disposition in the learning process.
Analisis Kesulitan Belajar Siswa dalam Pembelajaran Matematika Sahabat Halawa; Ratna Natalia Mendrofa; Yulisman Zega; Yakin Niat Telaumbanua
Ideguru: Jurnal Karya Ilmiah Guru Vol. 9 No. 3 (2024): Edisi September 2024
Publisher : Dinas Pendidikan, Pemuda dan Olahraga Daerah Istimewa Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51169/ideguru.v9i3.1466

Abstract

The factors causing students' learning difficulties are highly varied, including in mathematics education. Learning difficulties refer to the various challenges or barriers individuals face in the learning process, which can impact their ability to acquire, process, and apply knowledge and skills. Due to their diverse nature, these difficulties affect various aspects of the learning process. This study aims to describe the learning difficulties students face, particularly in mathematics education. The sample for this study comprises 25 students, specifically all students in class VIII-B. The data collection methods include tests, interviews, and documentation as supplementary data. The analysis reveals that 48% of the students fall into the "moderate" category of mathematics learning difficulties, while 40% are categorized as experiencing "difficult" challenges in learning mathematics. Specifically, in the topic of exponentiation, these learning difficulties stem from challenges in mastering and understanding the concepts, particularly in solving mathematical problems, and difficulties in number operations or lacking operational skills, leading to incorrect problem-solving. Interview results further support that students continue to experience significant difficulties in learning mathematics, especially in the topic of exponentiation.
Pengembangan LKPD Berbasis Open-Ended untuk Meningkatkan Kemampuan Berpikir Kritis Matematis Siswa SMP Wikari Hulu; Yakin Niat Telaumbanua; Yulisman Zega; Ratna Natalia Mendrofa
Ideguru: Jurnal Karya Ilmiah Guru Vol. 10 No. 1 (2025): January 2025 Edition
Publisher : Dinas Pendidikan, Pemuda dan Olahraga Daerah Istimewa Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51169/ideguru.v10i1.1473

Abstract

One effective alternative for students to enhance their understanding of the concepts they are learning through systematic study activities is the use of Student Worksheets (LKPD). There are many mathematical skills that students need to develop, one of which is critical thinking. The ability to think critically in mathematics should be improved. This research employs the Research and Development (R&D) method. The R&D method is used to create a product and evaluate its effectiveness. In this study, the resulting product is the development of open-ended LKPD for the topic of Congruence and Similarity of Plane Figures for eighth-grade students. Based on the results from each validation test, the improvement from the first and second revisions by the material expert validator (Validator 1) showed a percentage increase of 18.59%, and the improvement in assessment by the Validator 1 was 12.1%. The language expert validator showed an improvement of 27.38% from the first to the second revision. The design expert validator showed an improvement of 33.47% from the first to the second revision. Furthermore, the practicality test results indicated that 89.87% of the open-ended LKPD is practical for use in mathematics instruction. Data from the learning achievement test revealed a student mastery percentage of 87%. This indicates that the development of open-ended LKPD for mathematics instruction on the topic of Congruence and Similarity of Plane Figures has a very high level of effectiveness.
Co-Authors Bornok Sinaga Hasratuddin Hasratuddin Sahabat Halawa Telaumbanua, Yakin Niat Wikari Hulu Yulisman Zega