Unit studies use your child’s interest and then ties that interest into subject areas like math, reading, spelling, science, art, and history. For example, if you have a child who is interested in ancient Egypt, you would learn the history of Egypt, read books about Egypt, write stories about Egypt, do art projects about pyramids, and learn about Egyptian artifacts or mapping skills to map out a catacomb.
Packaged unit studies are available on popular topics like the Little House and American Girl books and also for virtues like patience, trust, and obedience. The advantage of this homeschooling method is that it recognizes the fact that people learn best when they are interested in the topic. The disadvantage is that sometimes parents can be overzealous and make a unit study out of everything, scaring the child off from talking about a new interest they might have.