That's a tough load for a teacher's summer! How are you going to have the energy to get through another school year??
If you are doing the best you can given your energy and your stress levels, then try to adjust what you are doing to not hurt your weight so much. Eventually you have to figure out how to get exhausted and stressed and not eat yourself up over 200 pounds (something that is life long work for some of us!) However, you might try eating less in the day for awhile and save some "treat" calories for the evening.
One of my favorite "icecream" treats is a frozen banana and .3 cups of half and half, you just blend it and blend it until it is creamy and lovely. Way better than the real stuff, IMHO, and only costs about 200 calories.
Take care and don't let the little ones tie you up!