Fairness and What's Right

There are always a few loose canons. A boy who can't sit still, a girl who shouts out whatever she is thinking, another who wants to play to the crowd and get entertainer of the year. But what about the 60% of the class that is interested and trying to understand and would like to learn, but is too shy, embarrassed, or not willing to stand up for their educational rights. I don't want to spend more time focused on the few kids who create discord and disruption; I want to teach the kids who want to learn and watch the light bulbs go off over their heads when it starts to click. How to structure a classroom so that the kids that WANT to learn can get what they need, and the kids who need to learn how to function in society can get that, and the kid who functions way above class level can make it clear enough that I can provide them with some specialized, stimulating, independent work- all without sucking the joy out of me and making me a crab apple.