It's all online, Erato, so any links given can be accessed by everyone. They sometimes recommend extra reading for interest but that isn't necessary to complete the course. In the ones I've already done there have been short lectures, videos, discussions. Then the learners tend to pick it up with lots of discussion on line. The moderators are lecturers from the Uni and they keep an eye on the discussions, answering questions where necessary and stepping in if anyone gets out of line!