Copyright and Fair Use

I was really surprised at how much education can use without getting permission. I didn't realize though that there was a limit to how much of a piece you can use (18, 19). I also didn't know that a single copy of a software program could be stored on a server as long as it is only being used by one person at a time. That seems really convoluted. How is the student supposed to know that the software is currently in use three doors down and who is supposed to be watching (2,4,5)? I also think it is frustrating that you cannot post copyrighted material on the web without permission. Part of the point of this class is to teach us to use the web to enhance our classes and instead of posting our students projects on the walls of the school they are on the web. This adds an extra complication to an already complicated project. Except for the size of the potential audience I don't see the difference; it is still student work and honestly, how much attention is a high school homework project going to get? I guess the only way around that is to put it in a password protected space(6,7,10,17).