General SS Resources- Pretty much elem-HS

National Council for Social Studies Teacher’s Library: http://www.socialstudies.org/teacherslibrary

Great resource of activities and lesson plans. Elementary-high school. Don't get stuck thinking because you teach high school your lessons can't be those for MS.

http://www.col-ed.org/cur/sst/sst216.txt

NY Times Learning Network: K-12

http://learning.blogs.nytimes.com/