Potatoes, winter squash, and dry beans are a useful crop for a student garden because they can be planted right before students leave for summer vacation and will be ready when the fall semester begins. They can also be
Dry beans need to be winnowed (removed from shells)- you can do this several ways: each pod individually by hand, or by putting the pods in a tarp and jumping on it/beating it, etc. and then separating out the pods. If you can get a big fan to blow across the tarp, the pods- which are lighter than the beans- will blow away. Beans can go in a jar, paper bag, etc.
Potatoes and winter squash are best stored in a root cellar, though we have been successful storing them in our kitchen for 2-4 months. We have fantasized about making our own root cellar using a barrel. Check out this tutorial- dreams do come true: