Coherence of an ICT-using Teaching Sequence: a Case Study in Optics at Lower Secondary School

International audienceThis communication reports a case study based on a discourse analysis in an ordinary classroom, at grade 8 in a lower-secondary school in France, during a teaching sequence in elementary Optics. It particularly focuses on a part of the last session, where the eye is presented as an optical system using a lens, the focal length of which is variable. For this part, the teacher is using a computer-based simulation. The teacher's discourse is analysed from a threefold point of view: the modelling processes; the conversions between several semiotic registers; the coherence between this session and previous activities in the teaching sequence. From all these points of views, the use of an ICT tool offers new learning opportunities to students, or strengthens learning opportunities already offered