A couple of times I have, in all seriousness, told my oldest that I would enroll him in school if his behavior continued to be a distraction to my being able to teach his younger brother. I never make a threat I'm not 100% willing to follow through on, so he knows I'm serious and so far it hasn't had to come to that. I wouldn't make such a decision lightly, but both of my children deserve the best education I can provide, and if one of my kids doesn't want to learn, I'm not going to let that prevent me from being able to teach the other.