Here is a list of some websites I have found helping throughout my education. They contain lesson plans, news, clipart, and so much more.  

www.kathyschrock.com

www.educationworld.com

www.education.com

www.historychannel.com

www.discoverychannel.com

http://ericir.syr.edu/Virtual/Lessons/

http://www.nytimes.com/learning/general/specials/terrorism/index.html

http://memory.loc.gov

http://www.aande.com

http://www.lessonplanspage.com

http://www.teacherfiles.com

These are sites that I have used in order to create my unit on Ancient Greece

A Virtual Stroll Through Ancient Olympia
<http://www.21stcenturyadventures.com/vva/olmpiava.html>

Ancient Olympia: A Walking Tour
<http://www.ipl.org/webink/Vol1No1/lograph/walktour.html>

Hellenic Ministry of Culture
<http://www.culture.gr/2/21/211/21107a/e211ga02.html>

Perseus Digital Library
<http://www.perseus.tufts.edu/Olympics/site.html>