Further, the book on which the curriculum is based. Diligently going through them will often teach you more than the structured class based on them. When coursera first came out I was very excited to take CS classes from top universities. Then... I was surprised at how generally poor quality the lectures and material were. Outside a few standouts, I think you are vastly better off reading quality, well reviewed books / papers than taking a course / watching lectures. (Unsurprisingly this felt true of my actual degree's as well).