[DavidI]

Jim, I would get corroborating evidence as to what exactly was said by the teacher in class regarding the grade. Not to say that your son is not truthful, but his interpretation as to what was said may be skewed because of emotions. I suggest that you talk to some of the other kids, with the approval of their parents, regarding the class incident to get a clearer understanding of what took place.

If the other statements support your son's allegations, then go to the principal and demands recourse. If it is a matter of emotional interpretation, then deal with the issue as a parent.

Good luck, David