As soon as you assign a quiz, you can view the answer key by first navigating to your assignment list by clicking "My Assignments" at the top of the page. Now, click the ellipses button next to the assignment name and select "Answer key" from the dropdown list.

You can also see the class code quickly any time from the "Manage Classes" link on your homepage or in the menu in the upper-right when you click your name.

To get to your Assignments page, click on the "Assignments" tab on the top navigation menu. In Progress: Assignments that are currently active in student accounts.