You are a high school teacher, and Luke Stresswell is at the top of his class with some close competition not far behind. He is doing well in your class, but the focus of the conference with his parents becomes, "Luke cannot get an A- in your class because he is valedictorian." What would you do in this situation?
I agree that the student should not be given special treatment, because it would be unfair to the other students. I personally believe in the use of extra credit, and would probably have some ways for all of my students to get extra credit, in which case I would suggest that the student take advantage of that.
I agree that you need to express to the parent that their child's grade will be based solely on their efforts and work and that you never give any extra credit or preference to students unless you provide it to the whole class.
Yes, the grades depend on the student and it's not your responsibility to give him anything that he did not work for.
This is a very thorough solution. It is very helpful.