The way they are doing the A B C thing now days is not what most of us know it as. It seems that if your child gets C's - they're at the class level and doing what is expected.

It seems impossible to strive for something higher when A's and B's represent levels 1-2 years ahead of what they're actually doing.

Good luck with your interview next month - the teacher must have some sort of back up as to how she arrived at her grading.