I read my kids' reports, and then go over them with them. They then have a repeat performance with DH (after I have coached DH what to say). We don't have too many surprises.
We always had class positions for the exams in our school reports back in the day. At my boys' prep school (where I worked 2 years ago) we still put on class or year position. I think parents want it.
I don't know if we do this at my school yet as I am in my first year and we haven't had school exams yet. In our termly short reports, we give grades in 6 categories, including achievement. Obviously an achievement of A is better than C, so parents can see where their child is roughly relative to the rest of the class.