Electronic Proceedings of the Thirteenth Annual Conference on Technology in Collegiate Mathematics


How to make tests for students that are using CAS tool (TI89)

Bengt Ahlander
Solangen 4613
46193 Trollhattan
Phone: +46520421900
Fax: +46520421901
E-mail: ba@ostrabo.uddevalla.se


Questions like "What are the roots of the equation x2-6x+5=0?" are not testing understanding if you use the TI-89. But if you give the students the answer that the roots to a quadratic equation are x=5 and x=1, then you ask the students to give an equation that will give these answers. This is a kind of jeopardy in math testing: do they really have the understanding behind the solutions of quadratic equations?