I'll start with how to access Google Drive and try to share some tips for using and introducing the different parts of drive for the classroom.
To give you some background, we were able to access Google Apps for Education around February this year. Each of our students has access to a personal google account though a district site. This allows them to collaborate safely within the network of the district. They also can easily access their files at home or from whichever computer in school they are working on. I love the ability to add files to a class shared folder for us all to work on.