The last I knew our local school (k-12th grade) was the only school in the nation using locally obtained beef. Right across the road is a big beef farm and so the woman that owns the farm sells her cattle to the school. The animal itself is transported to a USDA slaughterhouse and then sent back to the school, the total trip is probably 15 miles round trip. We are talking REALLY local. They also do the same thing with veggies, but lots of schools are doing that.
I have sheep and we bring our lambs in for the younger students (1st grade typically) for a program called "Exploratories". I think it is as much fun for my wife and I as it is for the kids. The verdict is still out upon the lambs though!
We've had chickens at our school (where I teach and my children attend) for the past 3 years. It has been a wonderful experience for the children. There are 2 chicken tractors there: one that belongs to a class and one belongs to my family. We moved our chickens to school because we had to move to a suburb that doesn't allow them.
Sadly, we recently had to remove them from the property (the school hens to a local farm and ours to my in-laws' house) due to vandalism. They will stay there through the summer, and in the meantime we've trying to come up with a way to keep them safe at school. These pictures can't really adequately show the damage.