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Using dynamic geometry software in teaching geometry proof
Geometry Proof
Dynamic geometry software
ICT in assessment
Issue Date: 
Paper presented at the 5th East Asia Regional Conference on Mathematics Education, Tokyo, 18-22 August 2010
In this paper, we report an exploratory study on the use of Geometer's Sketchpad (GSP) to help students learn geometry proofs. We take the stance that learning geometry proofs is meaningful if students are given opportunities to discover geometric properties themselves and to prove what they have discovered. In our approach to teaching the topic on Circle Properties, leading to geometry proof related to the topic, we scaffolded the students' learning using GSP through progressive stages. One key innovation in this project is to include GSP as one component in assessments. This is to reflect the importance of investigative work they have done through GSP during their lessons. We used a perception survey to gather students' feedback on the approach taken to teaching the topic on Circle Properties and geometry proofs. The survey consisted six Likert-type questions. The results indicated that a majority of the students found GSP a useful tool in learning geometry, including proofs. However, there was still a significant number of students who were not ready to fully harness the potential of GSP. Nevertheless the results provide us with sufficient encouragement to fine-tune the lesson design for future implementation.
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