The document provides resources for finding free content for teaching digital citizenship to both adults and students. For adults, it recommends the book "Digital Citizenship in Schools" by Mike Ribble, which covers the nine elements of digital citizenship, and websites from Utah Education Network and Josten's with tools and ideas for social media in the classroom. For students, it suggests the digital literacy curriculum from Common Sense Media used in schools nationwide, the "Digital Driver's License Project" case studies from the University of Kentucky, and the private social platform Edmodo for grades PreK-6.