This site from the National Endowment for the Humanities is a rich resource for materials and lesson plans in History and Social Studies, The Arts, Civics and Government , and Literature and Language Arts.
This website is a great interactive and visual representation of the Human Development Index. Each country can be clicked on and information about that country's life expectancy, gross domestic product, and net primary enrollment rate will be displayed. Other information will also be given such as the country's population, and size. Another neat feature of the website is the ability to compare two countries in a head to head face off. The site will graph the information provided from both countries so easy comparisons can be made.
Free maps and lesson plans can be found here:
http://www.canadiangeographic.ca/worldmap/cida/teachers.asp?language=EN&Resolution=1024×768
Teachers' Domain is a free digital media service for educational use from public broadcasting and its partners. You'll find thousands of media resources, support materials, and tools for classroom lessons, individualized learning programs, and teacher professional learning communities.
The Education hub at BrightHub.com offers informational articles and quality discussions about the many facets of the educational process, including the technology and policies affecting today's schools and universities. Technology is a hot topic on this site, bringing learning out of the classroom. I particularly appreciate the lessons on helping students study, take notes, and get organized so they can succeed in school. The classroom management conversations are great, too!
This interactive writing site by Jenny Eather explains the types of text commonly written in schools with printable organizers and examples showing text structures, grammatical features and publishing ideas. It includes Word downloads to templates for helping students write reports, essays, e-mails, invitations, news articles, poetry, and more.
This is a super resource for your students! The Maths Dictionary for Kids by Jenny Eather is an animated, interactive online math dictionary for students which explains over 600 common mathematical terms and math words in simple language. The dictionary contains examples, activities, practice and calculators for anything from abacus to magic square to zero. You won't be sorry you checked this out!