Reality Based Test Tasks with Digital Tools at Lower Secondary

Abstract

Some results of the German CASI-Project (Computer Algebra Systems used in lower secondary schools) in terms of test tasks with real life examples are described. The CASI-Project examines the long-term use of digital tools in mathematics teaching with Years 9 and 10 secondary students. Different tests were developed for special teaching units with digital tools. This contribution brings reality based test problems into focus. The different representations of functional relationships and especially the change between the representations graph and real situation. The resulting differences between students using handheld CAS-calculators, and control group students, using simple pocket calculators, are presented with a focus on test tasks about real situations.