When the Workshop loads, you'll see a "Toolbox" in the middle of the page. Click on the "Collaborative Curriculum Design" link.
You'll now see a page welcoming you to the CCDT. From the menu on the left side of the screen, select "Start New Design".
If you aren't already logged in, ENT will prompt you for your user name and password. (If you haven't yet registered as an ENT member, you'll need to do so in order to gain access to the CCDT.)
ENT will now prompt you to give your design a name, and then click the "Next >" button. (Select a temporary name if your unit title is undecided -- you'll be able to change the name later.)
When the next page loads, you'll see the CCDT, which will look something like this:
You'll notice that your design name appears in the upper left of the screen, in the field next to "Design Name".
You'll also notice that the ENT village icons line the top of the page, giving you easy access to other areas of the site should you need them as you work on your design.