I have never heard of a public school district that did not pay its teachers for coaching sports.
Is this a public school? or private?
Often the "pay" here is only a few hundred dollars here and hardly reflective of the amount of time the coach puts into it.
I will have to ask him what the "pay" is for coaching, but I just know that it was a manditory extra and from what I remember him saying, they give him $8/day extra for doing it. Like he pointed out that sometimes doesn't even cover the gas he uses getting to the games. It's public school in a very poor district.