IF YOU DO NOT ALREADY HAVE AN EDMODO ACCOUNT...
1. Go to
http://www.edmodo.com2. Enter an email address and password to sign up for free (make sure teacher is highlighted)
3. Add or find your school
4. It will prompt you to set up a class. YOU CAN CHANGE ALL OF THIS LATER, so don't stress too much. The point is to wind up on your profile page.