In this introductory paper to the special issue of the "Annals of Didactics and Cognitive Sciences," we provide an account of the lectures delivered during the "Rendez-vous en Didactique" conference held in Paris from May 30 to June 3, 2022. The beginning of the paper revisits the conference's rationale and the request made to the invited speakers, framed within the perspective of dialogue among didactics from various scientific disciplines. Subsequently, we present some reference points to delimit and differentiate the so-called inter, trans, and multidisciplinarity approaches. This clarification allows us to position the approaches of the lecturers in response to the conference organizers' request. A brief presentation of their contributions reflects the diversity of the adopted approaches. We conclude this paper by raising questions about these approaches and discussing the significance of this "unique" scholarly output, in which researchers from multiple fields have made an effort to understand each other, engage in dialogue, and endeavor to propose common perspectives for their respective communities.