Education World® posts various links to national standards in social studies, U.S. history, and civics. The site offers various activities that integrate current events into the study of these subjects.
Federal Resources for Educational Excellence provides links to teaching and learning resources in U.S. history and government, created by various federal government agencies. All resources are electronic or available to teachers at no cost.
Shmoop is a new learning and teaching resource from experts and educators from Stanford, Harvard, Berkeley, and other top universities. Shmoop offers study guides and teacher resources for U.S. History and the Civil War (see direct links below), along with more than 370 smart, fun learning guides for literature and poetry (see direct links in next category).