Research Article
Muhammad Noor Kholid, Rahmadani Fitri Nur Handayani, Safitri Nuraini
CONT ED TECHNOLOGY, Volume 18, Issue 4, Article No: ep686
ABSTRACT
GeoGebra in mathematics learning can potentially be used to help students improve their mathematical communication and representation skills in solving problems. However, limited research has examined the integration of GeoGebra and contextual mathematics learning to improve these skills. The study aims to examine the effectiveness of GeoGebra in contextual mathematics learning on students’ mathematical communication and representation skills. Using a quantitative approach with a quasi-experimental design, the study involved 53 ninth-grade students from a junior high school, who were divided into experimental and control groups through purposive sampling. They participated in a five-session GeoGebra-supported contextual learning program. Data collection was conducted through a mathematical representation ability test and a mathematical communication observation sheet. Data were analyzed using descriptive statistics, independent-samples t-tests, and multivariate analysis of covariance to examine the simultaneous effects of the intervention on both dependent variables. The results revealed significant improvements in both mathematical communication and representation skills. The intervention produced a small effect on mathematical communication (Cohen’s d = 0.402) and a large effect on mathematical representation (Cohen’s d = 1.61), indicating stronger gains in students’ ability to construct and translate mathematical representations. The findings demonstrate that dynamic visualization combined with contextual problem-solving provides an effective learning environment for strengthening students’ mathematical communication and representation (Antara & Sutama, 2026; Kholid et al., 2024b; Septiani & Kholid, 2023). Unlike previous studies that primarily examined GeoGebra or contextual learning separately, the study provides empirical evidence that integrating dynamic visualization through GeoGebra with contextual learning activities can simultaneously enhance students’ mathematical communication and representation skills.
Keywords: GeoGebra, contextual learning, mathematical communication, mathematical representation, dynamic geometry software, transformation geometry
Research Article
Raihan Zainudin, Hutkemri Zulnaidi, Nofouz Mafarja, Mohd Zahurin Mohamed Kamali
CONT ED TECHNOLOGY, Volume 17, Issue 2, Article No: ep569
ABSTRACT
Traditional rote learning methods often fail to adequately develop reasoning skills in mathematics, particularly among pre-university students. This study addresses challenges in fostering mathematical reasoning abilities, as evidenced by declining TIMSS results and resistance to pedagogical innovations. My online teaching with GeoGebra (MyOT_G+) kit was developed as a technology-enhanced teaching solution to improve students’ understanding of propositional logic. Grounded in constructivist theory, the kit integrates GeoGebra software and Venn diagrams for an interactive learning experience, focusing on subtopics such as De Morgan’s laws, conditional, converse, inverse, contrapositive, and biconditional statements. Using the design and development research approach and the ADDIE model, the study combined qualitative and quantitative methods. Phase 1 involved interviews with five mathematics lecturers and five pre-university students in Kuala Lumpur to identify instructional needs. Phase 2 focused on designing and validating the MyOT_G+ kit with input from 13 experts. Findings revealed the kit’s user-friendliness, adaptability, and ability to reduce cognitive load, facilitating a deeper understanding of mathematical concepts. This study highlights the potential of integrating technology into mathematics education, offering scalable solutions for improving reasoning skills in pre-university contexts. The MyOT_G+ kit provides evidence that interactive, visual tools enhance comprehension of complex topics, with implications for pre-university education and teacher training programs.
Keywords: online teaching, GeoGebra, MyOT_G+ kit, propositional logic, mathematical reasoning