If you are like me and live your life with Google Drive now instead of off line options, you might find yourself getting overwhelmed by navigating Google Documents as they get longer. In that case, paying attention to your styles and creating a table of contents (and using outline view) will likely be helpful for you. If you aren't familiar with how to make it happen, check out the screencast below and I'll show you how easy it is.
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: