i have the same probelm at my school. we can either bring lunch or buy . And as you probuly know the food that they sell is really high in carbs and would not really fill you. But what I do is I but a salad sometimes and then on mondays they sell chicken caesar salad and so I buy . but other then that I bring my lunch every day . we took have to lug around our bags but I think it is not as bad as buying that aful food at school that is high in carbs and other not good stuff.