That's a good point. I couldn't stand the lectures in the few edX courses I took, but the slides and notes could be more beneficial. Although, I tend to prefer

That's a good point. I couldn't stand the lectures in the few edX courses I took, but the slides and notes could be more beneficial. Although, I tend to prefer the better continuity of books when reading, and there are tons of great books out there. Of course, getting through books takes a lot of intrinsic motivation while Coursera or edX courses may provide the extra motivation that will help more people get through the whole course.