Indispensable Manual Calculation Skills in a CAS Math Teaching Environment

Abstract

Which manual calculation skills are still needed when students use graphic/symbolic calculators or computers with computer algebra systems (CAS)? What should students be able to do manually, i.e. just using paper and pencil? In this lecture is the outcome of a two-day discussion on these questions, held by W Herget, H Heugl, E Lehmann, and the author, will be presented. Our answers and proposals are meant to be a challenge, aiming at sparking off a broad discussion about which manual calculation skills we still need to teach and assess.