Comparison of Student’s Mathematical Problem-Solving Ability between Realistic Mathematics Education Assisted by GeoSpace and Direct Instruction

Febi Ayumni 1 Indonesia , Himmatul Ulya 1 Indonesia , Sumaji 1 Indonesia
1 Department of Mathematics Education, Faculty of Teacher Training and Education, Universitas Muria Kudus
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Published 2025-12-30
Vol. 5 No. 4 (2025) PAGES 1705 - 1719
DOI 10.51574/kognitif.v5i4.3340
Views / Downloads 172 167

This study compares students’ mathematical problem-solving skills between those taught using the GeoSpace-assisted Realistic Mathematics Education (RME) model and those taught through direct instruction. A quantitative approach with a quasi-experimental nonequivalent control group design was employed. The participants were two eighth-grade classes at a junior high school, with one class assigned as the experimental group and the other as the control group. Mathematical problem-solving skills were measured using an essay test based on NCTM indicators: understanding problems, planning strategies, implementing solutions, and reviewing results. The instrument demonstrated adequate validity and reliability. The experimental group received instruction using the RME model supported by the GeoSpace application, while the control group received direct instruction without digital media. Data analysis using an independent samples t-test showed that the experimental group achieved significantly higher posttest scores than the control group (p < 0.05), with a moderate effect size. In addition, learning gains in the experimental group were higher than those in the control group. These findings indicate that the GeoSpace-assisted RME model is more effective in improving students’ mathematical problem-solving skills than direct instruction. The use of realistic contexts and interactive visual representations supports students’ conceptual understanding. However, as the study involved only two classes, further research with a broader sample is recommended to strengthen the generalizability of the results.

Ayumni, F., Ulya, H., & Sumaji, S. (2025). Comparison of Student’s Mathematical Problem-Solving Ability between Realistic Mathematics Education Assisted by GeoSpace and Direct Instruction. Kognitif: Jurnal Riset HOTS Pendidikan Matematika, 5(4), 1705–1719. https://doi.org/10.51574/kognitif.v5i4.3340
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Keywords
GeoSpace Mathematical Problem-Solving Skills Realistic Mathematics Education (RME)