There's multiple ways to do a curve (http://worthwhile.typepad.com/worthwhile_canadian_initi/2012/10/the-optimal-exam-question.html). I think you're thinking of only one of them.
Edit: Oops, not the link I was looking for, but it does give a list of reason to curve a class.
(no subject)
Date: 2012-12-12 01:37 pm (UTC)Edit: Oops, not the link I was looking for, but it does give a list of reason to curve a class.