The objective of this presentation is to give an insight in the design and production path that brought METID- Politecnico di Milano from an idea to its realisation. The idea was to create a series of MOOCs for Teachers, in order to support them innovating their didactical approach. The idea included also a methodological wish, that was to create those MOOCs through a collaborative process with international partners and involving international guests. The realisation shows at present time two MOOCs in Polimi Open Knowledge Platform, built with a partner Consortium and produced hosting a lot of guests from all over the world. During the presentation we will tell the audience what happened since the idea of this series was born.