SLIDES - Presentation by Lucie Dhorne The past few years have seen an exponential growth of the number of MOOCs worldwide. However, it is proven by the avaivalable completion rate data that motivation can quickly fade even for students who are highly motivated at the beginning of the courses. Faced with this realty, it seems crucial for the future of MOOCs to adress this motivational issue and to find ways to improve the completion rates. IFP School launched two MOOCs – “Sustainable Mobility” and “Oil&Gas” – which saw unusally high completion rates. In this paper we analyze the results obtained within these two MOOCs. Our goal is to identify the factors that made such completion rates possible and to understand how these key issues help to produce a succesful MOOC. By this analysis, we are able to give some tips in terms of video recording, interactive assignment design such as Serious Game or Mini-games and participant mentoring to promote motivation. Applying these tips when designing a MOOC will minimize the chance of participant withdrawal and thus lead to high completion rates.