These proceedings of the ?fth European Conference on Technology Enhanced Learning (EC-TEL 2010) exemplify the highly relevant and successful research being done in TEL. Because of this greatwork, this year's conference focused on "Sustaining TEL: From Innovation to Learning and Practice." The last decade hasseensigni?cantinvestmentintermsofe?ortandresources(i.e., time, people, and money) in innovating education and training. The time has come to make the bold step from small-scale innovation research and development to larg- scale and sustainable implementation and evaluation. It is time to...