Sign up sheets look very similar to checklists, with one major difference:
A checklist is a list of people who all need to do the same thing, like turn in a permission slip. A sign up sheet is a list of a bunch of things that you need volunteers for.
Step One: Create the sign up sheet and invite some volunteers
Go to Communicate > Sign Up Sheets. If you don't see that option you will need your privileges updated to include sign up sheets. Select "New" in the top right corner. Give your sign up sheet a name, a due date, a brief description, and select who will need to sign up.
Step 2: Add some items to the sign up sheet
Once you save your sign up sheet you'll be directed to the page below, where you can add tasks or items to the sign-up sheet, assign people to tasks/items, and publish the sign up sheet when it is ready to go. (It will be in draft mode until you publish it.)
Step 3: Sign Up!
Everyone you've invited to your sign up sheet will have an assignment listed on their "My Assignments" page until the due date is passed. Once they volunteer for an item, that will also show up on their assignments page. Assignments are also included in the newsletter.
Enjoy!