Ok this has been done/covered before! They're being phased out. I know. But given my ds is about to do them. And his school is keen and embracing them it's new to me.
I don't care! It won't benefit him. Focusing for long periods makes a particular health problem worse for him. I know he's doing fine, his teacher knows this too. So this is for his head and future parents.
The parents I know at my son's school go along with things and don't seem to mind but I do.