This study aims at demonstrating that secondary school teachers of physics, in two sub-divisions of Mbanza-Ngungu, still provide teaching materials in both sub-divisions of Mbanza – Ngungu foresee didactic materials in their planning sheets. Hower, these materials are not always adequate to the lesson objectives and the conditions of their exploitation. Their physical existence is a problem, too.
Thus, by a technique of investigation with the teachers of the region of Mbanza-Ngungu, by interposed audio-visual recordings, we identified, thanks to an observation grid, through the notion of electricity taught in 3rd Scientific, the existence and the nature of the didactic material, the moments and the conditions of its exploitation in order to improve the didactic action of the teachers of this class.