When the teacher uses common language instead of geometry lexicon
Résumé
The understanding and proper use of mathematical lexicon, particularly that of
geometry, are part of the expectations of the programs for each learning cycle. The
official instructions insist on the acquisition of the lexicon by the pupils no matter
the discipline (Eduscol 2015) and a fortiori in mathematics (MEN 2016). The idea is
to promote the reading, the exploitation and the communication of results from
various representations, to help learning, to argue, to describe and to better conceive
the objects studied.