I am a 3rd grade teacher and am going through the same thing--I am trying to remember to take it one day at a time, breathe, and try to enjoy each moment and not dwell on the fact that there are only 6 more weeks of school.
These last 30 days will be gone before we know it, too.
Well, as of now, you have 27 left. Just keep counting your blessings as the days diminish. If you are a senior this year, you might find it odd that your peers will want to suddenly get sentimental as graduation approaches. The chances of getting along with people increases from here on out.