There are many ways that parents choose to home-school their children and one of these methods is known as unschooling.
Unschooling is a very non traditional method which is mainly child directed. It allows children to learn through activities that they choose. There is very little or no time spent sitting at a desk doing worksheets or taking notes. I am not sure how it got to be called unschooling as there really is a ton of learning taking place, but I suppose it is just that it goes in the opposite direction of how we picture a typical public school classroom.