Collaborative learning strategies are the new frontiers in the blended education field. At the same time, they have undeniable implementation difficulties, particularly when they are applied in an international context, where different educational traditions must coexist. The collaborative blended learning model presented here has been tested during the first year of the E-Urbs Master, European Master in Comparative Urban Studies, funded by the EU. The model proposes a system in which the different aspects of any advanced distance educational format have been identified and put into balance, also considering the problems derived from an unbalanced distribution of priorities.