Be Responsible!!
Not only is it your responsibility to ensure that you are using resources ethically, but it is our duty as educators to teach our students how to do the same. When you are using content in your classroom that you didn't create (including print materials, images, videos, etc.), make sure you are following the Fair Use Guidelines. The same goes for student projects and any online resources you create or manage, such as a Moodle or Blackboard page. If you are having your students create accounts for online activities, such as Web 2.0 projects, be sure to read the Terms of Use for that resource to make sure your students are old enough.