Educational Technology and Copyright Law

I learned about fair use and what copyright is from the article Educational Technology and Copyright Law. For example i learned that mainly anything that you write or publish has to be copyrighted or it can be stolen. I learned that it doesn't matter if you thought of it first it has to be written down. For fair use i learned that if you want to use someones work you have to give credit to the owner. For example taking someones work and using it as your own is illegal but taking someones work and using it to teach a class if fair use. It's fair use if you use it to educate. When you are in a class room and you do an amazing work of art and the teacher decides to use it for an example to teach a class. You might think that isn't fair but it is part of fair use. You can only use a certain amount of a video too.