Abstract
We describe the Universitat Politècnica de Valèncias experiences in selecting and testing a MOOC Platform. We have tested Google Course Builder, Sakai and MiriadaX. We have made a pilot course with Sakai
(200 students), two course editions with Course Builder (one with two courses and 1100 enrolled and other with eight courses and 6500 enrolled) and one course edition with MiriadaX (with 14 courses and 76000 enrolled). In this paper we explain the process we followed, what we achieved and the problems we found with the different platforms and the results we have got with the students throughout this process.