UREM-ULB :
Unité de Recherche sur l’Enseignement des Mathématiques

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Abstract
For many people, mathematics just means calculations.
Mathematically well-educated people know about proofs.
Few realize that mathematics takes ideas and imagination.
It is not easy to convey this to secondary school pupils.
One year ago, I gave it a try with Descartes’ logarithmic spiral.