Class websites are only available in Cc Pro.
To rename a class website, go to the "Class Websites" tab at the top of your screen. Once there, you should see the information for your class website. You can change the title of the site, under "Give the website a title." Alternatively, you can change last part of your url under "Create a custom URL to share with your students."
Note: You will not be able to use a url if it is already taken. For example, if you want to re-use your class website from last year, you will need to go to your old planbook, change the url to something else first, and then change the url of your new site.
Note: Class websites are only available in Cc Pro. Click here to learn how to sign up for a 30-day, FREE, trial.