English
L'Orthodyssée des Gram (in French) (Geoffre et al. 20181) is an online app using an algorithm to calculate grammatically correct sentences according to the selected "tirettes" (in French; choices of written words). It provides different levels of difficulty and allows to target the notions of sentence components and syntagmatic chains with primary students. The app is a way to activate the student's metagraphic reasoning then its verbalization, which may generate acquisitional processes if in context of interaction with a professional. Based on the analysis of a corpus of speech therapist-child interactions, we have extracted metagraphic acquisition/learning sequences (SAAM), co-constructed between the adult's supporting interventions and the children's verbalizations. This leads to the definition of formats and the establishment of links between the speech therapist's scaffolding, the objectives of the activities and the children's metalinguistic skills development.