Directory resources are brought to you by human editors not algorithmic programs (spiders).

When you have broad topics to research, e.g., Galileo, Civil War, Nile River, etc., it's more efficient to use directories (Librarian's Internet Index-LII) over search engines (Google). Directories offer students categories to search (assistive navigation) and all the websites/resources/links in a directory have been examined by a editor (a human) before being committed to the directory.

The Open Directory Project

Librarian’s Internet Index

Internet Public Library

Refdesk

RefSeek

RefSeek is a web search engine for students and researchers that aims to make academic information easily accessible to everyone. RefSeek searches more than one billion documents, including web pages, books, encyclopedias, journals, and newspapers.

Best of the Web

Includes Blog directory.

IPL Ready Reference (direct link to reference sources--encyclopedias, almanacs, dictionaries, etc.)

Infomine

Intute

Subject specialists review and evaluate thousands of resources to help you choose the key websites in your subject. Intute is a collaborative effort between 7 major UK universities including the University of Oxford, Nottingham, and Manchester Metropolitan University. This directory is geared towards high school and college level students.

JoeAnt

Includes Blog directory.

Awesome Library

BubLink

KidsClick

Encyclopedia Smithsonian

Fact Monster

StartingPoint

diddabdoo

"We utilise Google's URL filter to restrict the results from sites that have been reviewed by human's and classified as kid/teen safe."

CyberSleuth for Kids