Do you mean install? You need to give us a LOT more information about what sort of help you need...
I cannot open the program. It used to open but now it doesn't I am working the 'CLASSROOM IN A BOOK' and my disk will no longer load It can't seem to find the program
Version of ID? OS?
Does InDesign open without attempting to load anythgn from the disk? Have you reset ther preferences after the last lesson as directed?