This video explains how HIV enters the host cell, how it co-opts the cellular machinery to reproduce, and how to fight HIV infection.

Get independent practice identifying points, graphing points and equations on the coordinate plane. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.

This is the first of four linked pages presenting a comprehensive essay on the Haitian Revolution.

See all the parts of a hand and the different things they can do. Book has one word per page. Includes audio narration in English, Spanish, and Turkish with text in English.

This video segment from Between the Lions uses an animated road sign to illustrate and spell familiar words that begin with the /k/ sound that the letter "c" makes.

This site from Palomar College describes the conditions needed for theHardy-Weinberg Principle to hold true.Completes sample calculations involvingthis principle.

Using understandable words and exceptional graphics, this page describes the transfer of energy by means of the convection process. Contains several links to related topics.

Through viewing a video about Helen Keller's life, examining a 1904 photograph of Keller, and reading excerpts of her autobiography, students will learn about Helen Keller's commitment to advocating for equal treatment for people with disabilities. The lesson concludes with students choosing a quotation that best represents Keller's challenges and successes

This primary document is a copy of the Helsinki Agreements of 1975 which recognized the borders in central and Eastern Europe that were set up since the end of WWII. They show the acceptance of the Soviet influence in Eastern Europe. and called for protection of the human rights for all citizens of the nations signing the agreement.

In this story, a young girl helps out with chores at home. Includes audio narration in 10 additional languages with text in English.

Artcyclopedia provides direct links to Rousseau's works in museums around the world. Online exhibitions and reviews.

This Henry Howard (1517-1547) index page provides links to a biographical profile of the English poet-soldier as well as to full text examples of his work and related resources.

This site from ibiblio.org gives extensive biographical information on Herbert Hoover based on the collection in the Herbert Hoover Museum.

This site is a compilation of the captions that appear in the Herbert Hoover Presidential Library. What results is a thorough look at Hoover's life. Divided into nine parts to make navigation easier. Also includes fact sheet for general overview. Provides information on his wife, Lou Henry Hoover.

This extensive collection from the University of Texas Library Online of detailed maps of many regions of the Earth.

Learn about Social Security and the New Deal at this inquiry-based site. Contains many primary source documents for students to critique, a timeline, video, audio, assignments and a webquest.

This award-winning site has everything you need for online lessons or independent study about the Spanish-American War. Uses an inquiry-based approach with lots of primary sources, and the material can be used in conjunction with almost any textbook. Includes a web quest.

A primary source on the influence of women in labor unions in the early 1900's. A distinction between men and women at union meetings is examined.

These primary source documents are about ordinary Americans throughout US history. There is a full search feature. All the historical documents, whether they are text, image, or audio, have been vetted by a historian. They are initially arranged by date.

This History Place timeline briefly identifies over 100 events of the American Revolution between January 1, 1777 and December 31, 1783. In addition, there are many links to other pages which expand on the events and people mentioned in the timeline.