Maureen at the Thrifty Homsechooler has posted about a site with free unit studies. There are also free unit studies here, and here and here, at Real Learning--just look down the lefthand sidebar for Rabbit Trails and Reading Journeys. There are several more in the works! I'm a huge advocate of this kind of sharing. Unit studies are a great way to learn together as a family and collaborating on the planning of unit studies is a wonderful way to support each other in this educational endeavor.