I am going to be hosting workshops on using the tools right within our Google Drive over the course of the year. But I just found this infographic when I was reading an article from Edudemic that intrigued me and got my brain going. There is certainly TONS of potential within Drive, so give this a look and see if it gives you any inspiration.
I had a teacher ask me if there was a way to hide or remove students who are no longer in your class. The answer is maybe. It depends on if they are officially dropped from your class and appearing as red in your roster and gradebook. If not, then no, you cannot remove them until they have been unenrolled from the class. If the student is showing up as red in your gradebook though, you can hide them so you don't have to worry about them. Here is a screenshot to help you do it: