Potential of GeoGebra is extraordinary!
I am using GeoGebra for teaching geometry to my students. In class IX, C.B.S.E. Syllabus the properties of circles are taught. I have realised that the students cram the theorems without actually understanding their meaning. At the time of examination they do not attempt the questions based on application of geometry. This year I tried this open source software for teaching the properties of circles . Due to the interactive interface of the software, the students can visualise the geometrical theorems by actually verifying them using the tools available.
For example , the theorem "angle subtended by an arc at the centre of a circle is twice the angle subtended by the same arc at any other point on the remaining part of the circle"
The students do the theoretical proof of this theorem and simply cram it.
I tried learning this theorem using GeoGebra with the students, and the outcome was incredible.
The software is very easy to use by the teacher as well as the students. It is freely available and can be easily downloadable.
The verification of other properties of circles can also be done in the same manner.
