I went to school in several States, and it ran the gamut from unhealthy corporate slop (e.g. multiple schools in California) to delicious food prepared daily from fresh ingredients by local grannies (Nebraska).
The latter was amazing and wasn't even generic American food, it reflected the predominant ethnicity of the people that lived in that locale (because grannies doing home-cooking). This was decades ago and the area has hollowed out, so I don't know if it is still a thing there.
I went to school in several States, and it ran the gamut from unhealthy corporate slop (e.g. multiple schools in California) to delicious food prepared daily from fresh ingredients by local grannies (Nebraska).
The latter was amazing and wasn't even generic American food, it reflected the predominant ethnicity of the people that lived in that locale (because grannies doing home-cooking). This was decades ago and the area has hollowed out, so I don't know if it is still a thing there.