They can either read the books aloud to their children or have the children read and give a summary of what they have read. Homeschooling doesn't have to be expensive. This post also links to information about how to homeschool for free. Parents need to determine their homeschool budget and stick with it. No one needs to spend more than they have allotted for homeschooling. There are so many resources out there. Sometimes the free resources can give children an even better education than a packaged curriculum.
Free Homeschool Programs