Copyright Laws - What CAN I do?

What is copyright and how did it come about?

The edublogger has the best article I have seen that best describes what copyright laws means and how it affects teachers.

EDUBLOGGER
The laws on intellectual property, copyright and file sharing are so detailed it is difficult to get clear about what we can and can't do. The reality is even purchasing a license still limits you and does not allow a free for all of photocopying, downloading and movie playing.

My Presentation for considering a move towards an Open Source School

So what is Creative Commons?