Geometrical Working Space, a tool for comparison

International audienceThis theoretical text is nourished by a comparison project (ECOS program 2003-2005) on mathematical curricula between Chile and France. How and what to lookat in curricula? What tools could help to produce fruitful comparison? Following thepresentation of our theoretical framework, Geometrical Paradigms, the study of anexercise about the determination of inaccessible magnitude, from French andChilean point de view will lead on to the definition of Geometrical Working Space.With these concepts, we will precise important differences between French andChilean intended and available curricula, what concerns Geometry between 8th and10th grade