Is a school food provider allowed to become a monopoly inside a school?

Our school food provider has been yearly reducing food quality and raising food prices. On the foods that they can't lower quality, they raise prices faster. Cans of soda there are 1.25$, and that is one of the cheaper things. Three pieces of chicken about the size of the space between your pointer and thumb if you make a circle are $4.75. On top of that the lunch program doesn't allow other competition, even vending machines. We can't even order food from outside of the school. Is this allowed?|||The food service is seperate from the school. They are an outside food service company that have to bid for the job every year. When bidding, the company has to submit a menu and prices. If the food service is charging crazy prices, the school knows about it. If they are there, then they won the contract and there prices are better than anyone else who bid most likely. Changing prices mid-school year is a no-no. I would bring your own lunch, They cant stop you from doing that. $1.25 is alittle high for a school, but not crazy. You are paying for refrigeration, convienence....|||no shoot them with a gun before they serve u ****