In this paper an innovative experience developed by seven Universities (six European and one non-European) to teach a two weeks summer course in a non-conventional, remotely way is presented. The course is developed using a Project Based teaching-learning methodology and it is also designed to have a deeper knowledge of the relationship between sustainable development and the economic and financial conditions. The experience is innovative because the technology used, allowed students to share knowledge and participate from countries all over the world. Competences of students in this context are measured and strengthened. The most interesting issues, challenges and difficulties are presented here. Conclusions help professors to propose actions to improve the methodology in order to strengthen students’ competences.