[kisito]

Is the problem than he/she is too full of energy? Also ask yourself if he is feeling bored. What positive things does he do? He can't be all bad. Identify their strength and commend them for it - This is positive reinforcement. Focus on the good things they have done and give praise rather that demonize the kid for disruptive behaviour.
If he is just hyper, then that may be something to do with energy. Try activities at the start of the class that burn their energy. I had a class of hyperactive kids and at the start I would use some high energy games that almost tires them out. After that they can focus on settler type of activities or low energy games. A good energy burner is the volleyball game
Without this approach I can't get them to concentrate.
Some kids may just be plain spoiled and it may be coming from home. May be they are used to getting all the attention they need at home. In that case talk to the parents.
I do not encourage bullying but sometimes a bit of peer presure helps a kid realize how their bad behaviour is affecting others.