Léa Chrétien is a postdoctoral researcher in the Brain, Behavior, and Learning Lab, working on the Lab2School4All project. She completed her PhD at the LaPsyDÉ (Université Paris Cité) under the supervision of Arnaud Viarouge. Her doctoral work examined the factors that shape children’s ability to process numerical information, and the role of these factors in the development of early arithmetic skills in preschoolers. In her current research, carried out with Jérôme Prado and Alice Gomez, she extends this focus to the development of fraction in children, notably children with developmental coordination disorder (DCD).