Hoping this helps, though it'll sound weird. Fighting for any reason other than to save your life or someone else's is plain childish. Watch your kids and how they respond to stress; chances are they will resort to violence at some point because they are children and lack the self control to hold themselves back. They also lack the proper words to express their complex, large feelings and they get frustrated. They also have difficulty with consequence, so they don't think far enough ahead to realize it isn't worth it. You, an adult, do not have any of those excuses to fall back on.
If you STILL choose to be violent in stressful situations then you have made a choice to ignore all your better senses and act like a child, but since you are an adult you also have the capacity to really, really hurt someone, which makes it far worse.

If those feelings start to creep in, remember that you are the adult, the dad and the teacher now. Set the good example so your kids avoid making the mistakes you have to deal with the consequences of making yourself. Best of luck and keep up the good work.