Dealing with AD/HD kids is tough, and I'm speaking both as a special education teacher and a person with ADD. However, there are a bunch of things I have found that work with my students, at least most of the time! ...

1. Since many children with AD/HD have other learning disabilites that tend to be masked by their zany behavior, I would recommend having the boy tested. Maybe part of the reason he is out of control is because the work is too difficult for him (or, alternatively, too easy.)
2. Give him Playdough or silly putty to play with while you are giving instructions, reading out loud, etc. Or, let him draw or color. This may sound like letting him off the hook, but I have found that many AD/HD people focus better and absorb more of what they hear when they have something to do.
3. Get the whole class up and moving now and then. I like to have a two minute stretch in the middle of every period. Or, you can use games such as Around the World to practice math facts and get the kids moving at the same time.
4. Expect him to wiggle. He can't sit completely still, and even if he could, he would be concentrating so hard on doing that that all instructions would go out the window. If other students are distracted by him, put him in the back of the room so he can get up, lean against the wall, etc. If he gets out of his seat and wanders around the room, make sure it is really interfering with instruction before you make him sit down. I have a student who moves to a different chair about every fifteen minutes, but the others have gotten used to this and he gets his work done, and that's what really counts.