The Art of Keeping Chickens
If you are looking for a great 4-H project or a way to supplement your income, keeping chickens and selling their eggs and meat would be feasible with just a small section of property.
Chickens that are free-range are all the hype nowadays, and you can make money from selling farm-fresh eggs.
These books will help you do it:
And here is a book about raising not only poultry, but other small animals:
All of these books are in the public domain. You could combine the information in them and create an ebook that is relevant to new homesteaders.
Use the books as a course for your older children in agriculture and life-skills. Start a poultry class at your homeschool co-op. Or, just use the information to raise your own chickens!