Gmail in the classroom

I am a high school science teacher and have become involved in so many different things that I find myself being out of the classroom more and more often.  I have found that by creating class groups for all of my classes that Gmail is an effective way of communicating with my students even when I am out of the building.  There were several little hints in the tutorials that I am planning on using to help me be more efficient.  Most of the students turn in their assignments via Gmail, but I have to go through and sort them into the proper folders.  I just set up a filter to do that for me.  I can't wait to see how it works