Science-Various Grades
www.Acs.org/kids
www.Sciencekids.co.nz
www.Physics4kids.com
www.nuffieldfoundation.org/teachers
Social Studies-Various Grades
www.Socialstudiesforkids.com
www.Zinnedproject.org
www.Mrdonn.org
www.Historyteacher.net
www.Kids.gov