I do like Codecademy, a lot. so please don't take this anymore than as a suggestion or observation.
I find when trying to learn a subject, be it Maths, Science or Coding, I like to learn the information as quickly as I can.
When following the tutorials on CC, I find that you have to search for the information. 'I.E Read the sentences carefully or you won't know what to do. Which I understand is how you learn a subject fur-alley.
Here's the suggestion though, Is there any chance you could just list what to do in way such as bullet points? Without the extra info. I used this system with my Physics tests and got A+'s. I like to learn the info quickly and move on, by having it laid out clearly, and accessed easily, I am able to learn and retain the information easily without having to skim through, what I feel is, unnecessary text.
Obviously I wouldn't say replace the current tutorial/guides with this, but make a new section or option for a fast track version (or whatever you may want to call them!)