That is where I learned the cooks were people too and also had kids in the school system and they absolutely spoiled us. We would get chocolate cake from their special reserve and all we could eat of the daily menu stuff. We even got ice cream. I don't know when that was on the regular menu.
Everyone at our school was pretty damn poor so working in the kitchen was a treat. We had a long list that everyone signed up on and got to work in there for a week. We ate anything we wanted and got our lunch for free. As the kids would say now.....it was the bomb!