DS is only 7, but we have a lot of this sort of frustration/rage. As best I can figure, it comes from a failure of the work product to conform to the kid's visualization of what he was creating - whether it's a physical product or a perfect answer.
I just try to point out over and over that it's OK, and even good. If you aren't making mistakes, you aren't learning. Sometimes he can hear me, but usually not until the flash point fades. I have no idea if it's helping - but he does parrot this back at me when I get frustrated by a mistake that I make!
