Badr Defouad* (France), bdefouad@magic.fr
Instrumentation processes underlying the use of TI92 at high school level

During two years, we have been involved in a research project dealing with the
integration of the calculator TI92 at high school level. The purpose was to
analyse:
* the processes underlying the instrumentation of the TI92.
* the mathematical knowledge required for this instrumentation.
* the articulation between this kind of knowledge and the one expected by
  the institution.
The data include questionnaires, classroom observations, assesments and a
biographical study of 9 students.

We will focus on the biographical study of the students, presented through the
results of two interviews and a specific assesment, particularly on the part
concerning a classical task at this level of schooling : function study.