Try this working example.
Please realize this is just one type example. You will
find you can create the sign up sheet you want.
This is for a "spring fling". Pretend you are the the user
not the builder of the signup. This is what your people
You are the homeroom mom and are being asked to sign up for a
booth to work and a time frame.
1. Pick a booth and time and click on "I'll do it"
2. Enter some information. Make sure you remember the "Undo
3. Accept the task. Notice the sign up re-displays and some
of your information shows that you "got" the slot and its now
4. Click "Undo" and enter your "Undo Code" and now see that
the slot is available