I know the quality tends to vary from school to school but when it comes to how healthy eating for kids have been emphasized, often times in the school cafeteria the food that are served would look as if they have been dug from the radioactive underground.
Ever experienced something like that? If not, then lucky you.
The burgers sometimes are undercooked and even then they would taste like something have been added in there when it shouldn't have, whatever it was (believe me, it's disgusting and that's in high school). It gets better in college but still, during the early times, bringing your own lunch is the safer bet.
"As the old saying goes...what was it again?"