online courses

I am taking an online course in edx site. Is an English course. I think, allthough we will not have a degree, they just give us a certificate of participation, the courses are very useful. We can have a degree if we pay, but if we don't want to, we have the participation diploma and we can stiil learn for free. Evaluation is not so accompanied and sometimes are colleagues who evaluate, but I enjoying it. I am also taking some courses on Coursera, but personally I prefer EDX because we have weekly deadlines to deliver the works and Coursera deadlines are only at the end of the course. But I like both sites and i only now started the courses. Let's will see how it goes :)