How do I switch UIViews from a UIViewController?

Just starting out programming for the iphone. I do not want to use the navigation or tab views that are provided. All I want to do is have 3 UIViews. Based on different button clickes in each UIView I want to switch which of the 3 views are displayed. How should I organize this? One UIViewController that looks after all of the UIViews? How do I register all of the views and switch between them? I tried to layer the views but they seem to overlap. I want them all to be independed views. Any help would be great. I cannot find any examples of this. I would like to do all of this in the Interface Builder. Thanks!!