Ball hits homeplate

[GoodwillRef]

I had a varsity playoff game on Friday and a left handed batter chops one off the plate that goes about 12 feet high and lands 3 feet in front of homeplate down the first base line. He doesn't leave the box...I point fair and the catcher tags him out. The batter looks at me and says the ball hit the plate...I responded yes it did and that is a fair ball. The head coach comes out to argue for a while and looks stunned when I tell him it is a fair ball...just another case of just because you are a varsity player or coach doesn't mean you know the rules.