A lot of non-Wolfram student education resources are hosted on GitHub so that bug fixes can be submitted via pull requests. I'm not suggesting that this should happen, but just a way to submit changes. Does this exist? I can't find it if it does.
I posted about one I found the other day that I'd like to fix.
Additionally, I'm not sure what the build process is, but I was on a flight yesterday with no wifi so I downloaded the PDF version. I discovered that this has gotten out of sync with the website version.
So this also would be nice to do upon changes to the hosted notebooks.
I would be happy to help do this.