A lot of handball at schools is plagued with silly rules, disputes and a lot more arguing then actual game play.
Here is a a variation of school handball I'm henceforth calling Square Ball. A gentlemen's game of school handball for the more intellectual of us (a.k.a. handball with rules that don't suck).
Here's a link to the pdf which details how to play the game. There's no diagrams yet which I plan to add in future versions, but this just gets it out there to save us from the nuclear apocalypse caused by our future children as a result of a primary-school handball dispute.