The TIMSS 2019 results indicated that 55% of Form 2 students in Malaysia struggle with learning geometry concepts. This quasi-experimental research aims to improve students’ geometric concepts by developing a geometry learning module. The module integrates GeoGebra and aligns all five van Hiele Learning Phases in the learning activities. The learning activities in this module focus on building and developing basic concepts in geometric measurement such as perimeter, area, and volume. In this research, 50 Year Five students in Tawau District were divided into two groups: the experimental group (n=25) and the control group (n=25). The experimental group used the module while the control group was taught using a traditional teaching style. Pre- and post-tests were used in measuring their geometric thinking levels by referring to the first three van Hiele’s Geometric Thinking Levels: visualization, analysis, and informal deduction. The data analysis showed a noticeable increase in geometry thinking levels in the experimental group. This showed that the usage of the geometry learning module integrated with GeoGebra was beneficial in helping pupils improve their learning rather than the traditional teaching style. In conclusion, using technology such as GeoGebra in learning activities can help students learn basic geometry concepts effectively.
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