Element of a collectionThe ‘Documentation Approach to Didactics is an entry of the Encyclopedia of Mathematics Education (Trouche, Gueudet & Pepin 2020). This entry has been updated in 2020 (Trouche, Gueudet & Pepin 2020). This article is a French adaptation of this updated version. It is part of a collection, gathering such adaptations in 14 languages (https://hal.archives-ouvertes.fr/DAD-MULTILINGUAL).The documentational approach to didactics is a theory in mathematics education. Its aim is to understand teachers’ professional development by studying their interactions with the resources they use and design in/for their teaching. In this text we briefly describe the emergence of the approach, its theoretical background, its main concepts,...