Maybe not to the same point, but DS (One grade skip) in elementary would get 3 out of 5 at the start of each year. No 5s would be given to anybody, because a 5 means you have mastered the subject for that grade level, and that could not happen because the teacher has not taught that material yet.

We let that fight go, the teachers did their best, and we the school tried to woek with us. By year end he was 5s and all was good. The only subject he would get 5s in was math, and that was because he was takeing math two grades higher. It changed when he moved into 4th and 5th where grades then came in and As where then givin.