Social Studies
Units, courses, lessons, and textbooks
College courses: http://learninglynx.blogspot.com/2010/01/olcs-and-how-to-use-them.html
Fun units: http://learninglynx.blogspot.com/2011/09/fun-science-and-social-studies-units.html
K-level Transportation unit: http://learninglynx.blogspot.com/2011/09/preschoolkindie-unit-on-transportation.html
Elementary Character Development: http://learninglynx.blogspot.com/2012/01/character-development-unit.html
Elementary workbooks, Grades 1-6: http://learninglynx.blogspot.com/2012/03/free-social-studies-workbooks-grades-1.html
Worksheets, preschool through high school: http://www.education.com/worksheets/social-studies/
Social Studies Online Learning Centers
Other Resources
Look here first: http://learninglynx.blogspot.com/2010/02/everyone-who-ever-does-social-studies.html
Videos and worksheets on many topics: http://learninglynx.blogspot.com/2010/02/lessons-on-social-studies-topics-with.html
THOUSANDS of links: http://learninglynx.blogspot.com/2010/02/12500-social-studies-links.html
AMSER Links: http://learninglynx.blogspot.com/2010/02/amser-social-studies-links.html
Discovery Resources: http://learninglynx.blogspot.com/2010/02/social-studies-lessons-with-video.html
Nobel Peace Prize Games: http://learninglynx.blogspot.com/2010/02/games-on-war-and-peace-nobel-peace.html