Supporting Communities of Teachers in producing and sharing OER

User-generated Open Educational Resources represent an important opportunity for schools. Since 2005, our research team has been working towards the exploitation of this opportunity. During three consecutive European funded projects, we have co-designed and run online courses for teachers on the production of Open Educational Resources using Web 2.0 tools and environments for the production of Learning Objects. Online courses have involved around 800 teachers from Germany, Hungary, Ireland, Italy, Romania, Slovenia, Spain, Turkey. The central idea of the three projects has been that educational content can be effectively designed, developed and shared directly by the community of teachers who will use them. This goal can be achieved provided that teachers are supported through specific training programs. The main lessons learned during the projects are presented in this paper.