Global educational programs have become increasingly important in Higher Education and the training sector. One promising solution for global collaboration is to collaborate using Open Educational Resources (OER). However, this opportunity has not been used to a broad extent even though millions of learning objects are freely available across the world. This paper discusses key barriers to the use of OER and gives recommendations how materials can be used in international collaborations. A special focus is development of the concept of trusted educational networks and its application for recommendation mechanisms to enhance sharing in communities of trusted colleagues.