The European project YouVerify! aims to develop a programme of courses and activities to stimulate media and information literacy (MIL) among students, information professionals and teachers at all levels of education. The sMOOC "Step-by-Step Disinformation" was designed for this purpose. The design of MIL pedagogical resources requires contextualising the student's work in the same type of media and social communication technologies in which they access information today, and which are part of their educommunicative activities. The design model of social Massive Online Courses, sMOOC, is an educommunicative tool capable of engaging learners and stakeholders in collaborative activities through social media and tools. Using a quantitative analysis methodology, based on data from the voluntary satisfaction questionnaire provided by sMOOC participants, we study their interest in disinformation mechanisms and tools for the verification and refutation of fake news. Their perception of the social and open methodology of the sMOOC and their interest in disseminating these new competences among their students or collaborators are reviewed. In conclusion, we highlight the high level of satisfaction with the initiative in terms of critical literacy. Also, thanks to the social component of the sMOOC, the interest shown by the participants in developing their own AMI projects.