Students will graph absolute value and piecewise functions on graphing calculators and see the effects of a, h, and k.

Students will add acidity to a healthy lake to see what happens to plants and animals in this interactive activity adapted from EcoKids.

In this video segment, the ZOOM cast demonstrates how to use cabbage juice to find out if a solution is an acid or a base.

This lesson teaches elementary students new vocabulary terms through book discussion groups. Students use context clues, prior knowledge, and print and online resources for vocabulary understanding in their discussion.

Students learn to use manipulatives and calculators to explore what happens when they change one number at a time in an addition number sentence. They record and develop the pattern that develops.

A commentary on the pros and cons of multinational corporations as they expand throughout the marketplace and the world. (From: Religion & Liberty, Vol. 10, No. 6)

Finches on the Galapagos Islands have evolved to exploit almost every possible niche. This diagram shows the range of food sources available on the island and the different beak shapes adapted to exploit each of them. Includes background reading materials and some discussion questions.

Ibiblio.org offers the address of the Japanese Prime Minister on the opening of the Imperial Diet in 1942.

This is the text of an address Austin made to the people of Louisville, Kentucky explaining the conflict between Texas and Mexico, and asking for support.

In this video segment from Greater Boston, learn how a man with severe motor disabilities can operate a computer and move a prosthetic hand by simply thinking the commands, thanks to the combined efforts of bioengineers and neuroscientists.

This is a perfect website for the younger student to learn about Native Americans in general and the Caddo Indians in particular. Lots of clickable, colorful pictures on their homes, culture, way of life, and earthen mounds. Also lots of historical and contemporary photographs of these Native Americans.

A profile of aerospace engineering as a career,includes aeronautical and astronautical engineers as sub-categories in this field. Includes Aerospace Engineering Overview - Preparation - Day In The Life - Earnings - Employment - Career Path Forecast - Professional Organizations -Profiles of Aerospace Engineers - Overview PDF - PowerPoint - Podcast.

Historical documents trace how the abolitionists virulently decried slavery and denounced those who supported it.

This website from the Library of Congress has primary source documents and pictures concerning the development of Liberia as a country for freed slaves in Africa. There are links to other areas on the Library of Congress website.

Part of a virtual exhibit by the Library of Congress, this site details the effects of the Civil War and Reconstruction on the newly freed slaves. It contains photographs of artwork and a map from the period.

From the Library of Congress, this resource documents the course of post-Civil War, post-slavery life for black Americans. Topics include education, constitutional amendments, voting rights and the many challenges African Americans faced as newly free citizens. Includes political cartoons, maps and legislative information along with other primary source documents and commentary.

This exhibit on the African American culture and history ranges from the 1948 desegregation of the military to Hank Aaron's breaking of Babe Ruth's homerun record in 1974. Includes images of historical photographs and documents.

Library of Congress collection of books, pamphlets, and photographs that are tied together for a special presentation "The Progress of a People." Proceed through the three sessions: Segregation and Violence, Solving the Race Problem, and Contributions to the Nation using historical documents.

An excellent overview of ground-breaking African Americans who participated in the World War II effort in the European and Pacific fronts. Also highlights awards, honors and African American women in the War.