There are some wonderful schools around now which have curriculum activities surrounding the cultivation of their grounds.
The kids are encouraged to keep fruit trees and vegetable gardens and even bees and chickens. They either eat the produce at school, bring it home to their families, or sell it to raise money for the school.
These kinds of activities for kids can help to teach them lessons about biology, husbandry and horticulture, cooking and manufacture, business, and teamwork. It also instills in them a love of nature (or at least a respect for it!) and allows them to get plenty of exercise and sunshine as well.
I wish all schools offered something like this for their students.