I fine that when they bite,they do it to get attention. So when he bites say won sentence," That was naughty", but do it with a tone in your voice. And say no more about it. You see, the less attention you give him the quicker he he going to stop. It is like when they swear, you go off your handle at them. And they love it, because you are paying attenetion to them. But if he does stop biting kids and you, reward him for STOPPING only. I hope this helps.