Note: not all pages may be available at school
Choose the Best Search for your Information Need - http://noodletools.com/debbie/literacies/information/5locate/adviceengine.html
Internet Public Library - http://www.ipl.org/
100 time-saving search engines for serious scholars - http://www.onlineuniversities.com/blog/2010/03/100-time-saving-search-engines-for-serious-scholars/
100 Useful Tips and Tools to Research the Deep Web - http://www.online-college-blog.com/index.php/features/100-useful-tips-and-tools-to-research-the-deep-web/?zbrandid=4053&zidType=CH&zid=1111774&zsubscriberId=1011171838
Internet for History (web tutorial using history sources - from UK) - http://www.vts.intute.ac.uk/tutorial/history/?sid=1296805&itemid=12021

Added Jan 2013
50 Search engines you probably don't use yet http://edudemic.com/2012/10/50-search-engines/