This year eTech Ohio announced that they had partnered with Apple in order to create the Ohio iTunes U site. This is a collection of free audio and video resources that are available to anyone with internet access and iTunes on their computer (Mac or PC) These resources are gathered from various Government Agencies, Colleges, Public Groups, and K-12 schools and can be downloaded to your computer, ipod, or SmartBoard. Highlights include: The Ohio Historical Society, PBS, and The Columbus Museum of Art.
You can access the site via the iTunes Store: Store > iTunes U > Beyond Campus > Ohio

or via this
Link [iTunes Required]