And... the reality is, my kids also now know a lot about raising their own food. We have had very little formal instruction time, but simply being at the garden, helping the other gardeners (always much more interesting than helping mom), watching other gardeners, and just experiencing the daily life of a garden has taught them more than I could ever do from a textbook or even an enriched classroom environment. They have seen the process of transforming sad-looking soil into lushly growing, healthy, yummy food. Perhaps they couldn't pass a written test (especially if perfect spelling were required) but I am confident that any one of them would be able to create their own garden and help others do the same. And, well, they have: Stuart has a watermelon patch in one of the community beds, Anastasia has a 'secret' (weed) garden here at home, plus numerous cacti.
Learning by doing... it's the way to go!