Answer:
Some of the benefits of sharing a workbook include:
A. Shared information between students (ie: Mary writes a note about (blank) in the workbook and John reads said note and receives addition information about (blank)).
B. ^adding onto this, discussion on interpretations of a passage (ie: John thinks (blank) means this and Mary thinks (blank) means other thing, through notes they can discuss the meaning of the text.
Hope this helps. =)
Simply press F7 or go to the tab 'Review' and --> left click 'spelling'. Located in the top panel.
This will enable the spell checking phase.