The study (First stage)
The goal of this stage : As mentioned above the overall goal is to investigate relationships between visualization and concept formation in relation to definitions and proofs. Here we will focus only on the role of visualization and definitions in processes of geometrical concept formation. The findings from this stage will be used as a basis for (i) defining the knowledge level of the research population in relation to populations in other similar research work, and for (ii) the next and more advanced stages in our study.