Complete prison situation. No car, no privledges, a bed and a room with his schoolbooks and a lock on the outside. He stays in his room aside from meals with the family, and school. He is driven to school every day and picked up directly after, aside from school sanctioned activites. He is allowed visits from his friends if they are supervised. You get the idea.

As soon as he learns to behave in a manner that his father wants him to, he earns his stuff back slowly. If he fucks up, everything is taken away and he starts from square one.

Now that's obviously an extreme example, but I'm a firm believer that children of that age need a complete jail situation. I guess I'll let you know if I still feel that way in 10.5 years when my son turns sixteen.

CSP