Frank Postel*, Ralf Hillebrand (Germany), frankp@plato.uni-paderborn.de
A Tutorial Mathematical System for Elementary Schools

Modern Computer-Algebra-Systems (CAS) are not suitable for teaching elementary
algebra to school classes from year 7 to 10. The use of CAS in schools requires
a sophisticated user interface and specialized methods for school usage. The
system should compute step-by-step and must keep the order of subexpressions.

We develop such a tutorial CAS based on MuPAD. It will give warnings, when the
student makes a mistake or tries to make a step, which is not appropriate for
the solution of the problem at hand. Further, the system offers help on request
suggesting appropriate next computational steps. All this will be possible for
arbitrary problems entered by the student.