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All Journal Pi Radian Journal
Marlina, Ratna
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Mathematics

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Problem based learning with geogebra software on self confidence of junior high school students Marlina, Ratna
Pi Radian: Journal of Mathematics Education Vol. 1 No. 2 (2023): Pi Radian Journal
Publisher : CV. Pustaka Literasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63214/piradian.v1i2.pp65-72

Abstract

This research is motivated by the low level of confidence of junior high school students, so it is necessary to design learning that overcomes these problems. One of the alternative solutions is using problem-based learning approach with the help of GeoGebra software. In the process, this research uses an experimental design, where there is an experimental class that uses a problem-based learning approach and a control class using the usual approach. The population in this study were junior high school students in Cimahi city while the sample was in one of the junior high schools in Cimahi city. Data collection techniques using non-test instruments in the form of self-confidence questionnaire as many as 25 questions. Data processing techniques using two mean difference test. The results showed a significant 0.490 > 0.05. which means that there is no difference in mathematical self-confidence of junior high school students using a problem-based learning approach assisted by geogebra with those who learn using ordinary learning. This happens because of several factors such as time and learning environment that is less conducive, the use of methods, students such as lack of enthusiasm and concentration.
Exploring 11th-grade students’ mathematical reasoning ability on sequences and series: A qualitative study Faridah, Nurul; Marlina, Ratna
Pi Radian: Journal of Mathematics Education Vol. 3 No. 1 (2025): Pi Radian Journal
Publisher : CV. Pustaka Literasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63214/piradian.v3i1.pp17-32

Abstract

This study aims to provide an analytical description of how students solve five essay questions aligned with indicators of mathematical reasoning ability. A descriptive qualitative method was employed, with a purposive sample of seven 11th-grade high school students in West Bandung Regency. Data were collected through students’ written responses to test instruments and subsequently analyzed to identify errors in the problem-solving process and to measure mathematical reasoning skills. The measured indicators included: (1) formulating conjectures, (2) performing mathematical manipulations, (3) constructing evidence and providing justification for multiple solutions, (4) drawing conclusions from statements, and (5) verifying the validity of arguments. The findings show that indicator (1) reached the very good category with a percentage of 85.71%, while indicator (2) was categorized as good with 60.71%. Indicators (3) and (5) fell into the sufficient category with percentages of 32.14% and 46.43%, respectively. Indicator (4) was categorized as poor with 25.00%. Overall, the average percentage across all indicators was 50.00%, indicating that the mathematical reasoning ability of 11th-grade high school students in the school under study falls into the sufficient category. This study contributes to the existing body of knowledge by offering a detailed profile of students’ reasoning performance across multiple indicators, providing empirical evidence of specific reasoning weaknesses often overlooked in quantitative assessments, and highlighting the need for targeted instructional interventions to strengthen conceptual understanding and argumentation in mathematics learning.
Co-Authors Nurul Faridah, Nurul