Abstract
Year 8 students were introduced to the concept of mathematical proof before participating in conjecturing-proving tasks involving dynamic environments. This paper focuses on the argumentations of two pairs of students who completed a Cabri-based Quadrilateral Midpoints task. Supported by dynamic feedback and teacher intervention, even those students with limited understanding of geometric properties and relationships were able to engage in productive argumentation, conjecturing, and proving, with the dynamic geometric software serving as a cognitive bridge between empirical justification and deductive reasoning.
Jill Vincent