We present the results of research on writing as a possibility of expression for pupils thinking in science classes, during a study of Photosynthesis.. The support framework is discourse analysis as presented by Eni Orlandi, with an emphasis on the notion of authorship. We analyze nine productions, written in the form of scientific fiction, letter or logbook. The results show the nonoccurrence of empirical repetition, and in the meaning production by the students there were many manifestations of historic repetition. Considerations of the potential for writing in science teaching with similar conditions to the ones of the study presented here are made.
writing; Science Education; discourse analysis