The .work domains are cheap.
Turn in screenshots of your domain names in the browser. A text file showing a run of whois from the command line in Linux. Be sure to include the sections that read:
Submit your domain names linked to a default home page (index.html) that reads:
Go to Godaddy and manage your domain. On the DNS Zone File Page set the A record to your elastic IP.
http://stackoverflow.com/a/17569106/253576
Create a CNAME document in the root of your repository. Mine looks like this:
www.ccalvert.net
That's the entire contents of the file, with the text flush left
On GitHub, go to setings. Look for the section on your GitHub pages.
That's the total contents of the file.
Go to your GoDaddy account.
Go to the domain page.
Choose to manage your domain.
In the DNS zone file page, set the CNAME alias for www to:
username@github.io