Since he is nine, the sticker chart will work wonders with him, especially if the reward is worth it to him. I would suggest that if he gets his math homework done within like an hours time over 1 month, he can get something special, eat somewhere special or where he choices, or so on. I have to use this with my son as well because he has similar problems where Im pretty sure he is just bored. I give him money at the end of the week, like a $1. Then he can spend it when we go grocery shopping, or he can decide what he wants to buy and he saves up his money for it. He has other chores as well, so he gets some extra for them as well. Good Luck!