I would suggest that this is not normal at all. I've never heard of this happening anywhere and like you, I think it stinks. I'm sure the LEA would have something to say about this. Do you have a whistle blowing policy? Read it and make sure you're fully protected if you feel you need to tell someone about this. Poor schools who do 'play the game' properly, they're at the bottom of the pile because of your devious head.