With this change in perspective, the garden is not "dead" in the fall, but full of seeds and learning opportunities that can be extended throughout the winter as well.
Harvesting seeds is done in the fall, but processing seeds, making seed packages, and packaging seeds can be done in the cold winter months when access to the garden is often limited.
So do some research on saving seeds and seed swapping with other schools! A simple google search will bring up a plethora of results! Happy saving!!