One of the best things a person can learn to be more self reliant and prepared if a long term problem occurs is to feed themselves.
Since Gardening is very regional and in some states not the same all over I have listed schools here for my Oklahoma region. For a school in your area an internet search will product many in your area. If you have an Oklahoma area class on gardening or you have know of one please contact me with the information.
Tulsa Master Gardeners – Tulsa Oklahoma organization for people with a big green thumb. They have classes for the beginner and advanced.
Grogg’s Green Barn – This company is located in the Tulsa area and provides classes for flowers and vegetables.
Oklahoma Gardeners Association – Offers class for all levels on vegetable and flower gardening.