I had the opposite experience. I'm basically as non-math as you can get and still be in the sciences, and I found the classes quite intelligible (on a fast watc

I had the opposite experience. I'm basically as non-math as you can get and still be in the sciences, and I found the classes quite intelligible (on a fast watch without the notebook, and then a slow watch with the notebook for each class). FWIW, I think the supplementary material wasn't strictly necessary from a 'using the libraries' point of view. I'll never contribute to this field, but I feeling like Jeremy's explanation were conceptually helpful if not rigorous. For me, the order was: lesson, notebook+lesson, wiki + supplementary material if something wasn't making sense, and the discussion board if all else failed. That discussion board is basically useless unless you're taking the class in real time I think, which has been my experience for all MOOCs. Different strokes for different folks.