CAS-based task requirements and critical activities in completing them

Abstract

Having in mind essential features of mathematics, appropriate CAS-based tasks should require representing, operating and interpreting with CAS. Critical activities in completing these tasks may be found in transitions from representing to operating, and from operating to interpreting. These critical activities—related to mathematics, technology or both—are, for example, using CAS to apply transformations of represented objects, and relating CAS results with mathematical questions aimed to be answered.