If you find yourself not being able to select other sections you teach to apply a grade book set up, one of three things may have occurred.  
  1. The Grade book has already been set up.  If the grade book has already been set up, the grade book will not be available to apply a new set up.
  2. Assignments have been added to the section.  If assignments are added to the section and the "Add to Grade Book" check box is checked you are essentially adding an assignment type to your set up. This is seen by the system as starting the set up process and you will not be able to apply a new set up to the section.
  3. The Grade book Set up task has been entered.  If the task is entered then the system sees this as beginning the set up process and you will not be able to select a new set up to apply in bulk.
The first thing that should be done when a teacher signs into the site is set up their grade book. If they enter these tasks first they will be able to apply a new set up to other sections that have not already been started or set up.