Young children have difficulties writing argumentative texts which contain well-linked arguments and counterarguments even though they are capable of arguing by oral. Two main explanations have been provided to account for those difficulties: a) The writer has to manage alone two different points of view, whereas each of the two (or more) speakers can take charge of one of the points of view. b) The inability of young children to attribute an argumentative valence to statements.In order to improve the ability (...) of 8-year-old writers (skilled or less skilled) to manage the dialogical dimension of the argumentative text, two types of aids were tested. 1) A collaborative writing in which the children worked in twos to recompose an experimental argumentation. 2) A classification task was presented before the text recomposition task. The results show that 8-year-old children are capable of processing the argumentative valence of statements. However, only skilled writers take advantage of the two types of aids to compose a text comparable to the standard argumentative schema. (shrink)