Web Gateways

Bartleby.com

• http://www.bartleby.com/reference/

High School Hub

• http://highschoolace.com/ace/ace.cfm

Internet Public Library’s Reference Center

• http://www.ipl.org/div/subject/browse/ref00.00.00/

iTools

• http://www.itools.com/

Know Play

• http://www.kplay.cc/reference.html

Library Spot

• http://www.libraryspot.com/

Librarians’ Index to the Internet

• http://lii.org/search?basic_search=1