The study resource from Khan Academy provides an overview of Period 7: 1890-1945: The Progressive Era. An overview of an Progressive Era is provided. This resource is designed as a review for the AP US History Test.

The study resource from Khan Academy provides an overview of Period 7: 1890-1945 in American History. The Nineteenth Amendment is discussed in this lesson. This resource is designed as a review for the AP US History Test.

The study resource from Khan Academy provides an overview of Period 7: 1890-1945 in American History. The Spanish-American War is discussed in this lesson. This resource is designed as a review for the AP US History Test.

The SAT Writing and Language Test asks you to edit and revise passages written by an anonymous author. You will encounter a variety of passages from four content areas: Careers, History/Social Studies, Science, and Humanities. Each...

The clock radio, multi-tool pocket knife, and smartphone are all examples of mashup inventions: the combination of two or more ideas in a different configuration to create something new and productive, says Bernie Carlson, a history...

Read the history of how the Texas Education Agency came to be; from its beginnings laid out in the Texas Declaration of Independence in 1836, to the rigorous curriculum, graduation requirements, and implementation of a new, tougher...

NASA was preparing feverishly for a moon landing in a race against the former Soviet Union to honor slain president John F. Kennedy's 1961 pledge for the country to land a spacecraft on the moon (and return safely) before the end of the...

This undated photo provided by the Baltimore County Police Department shows Margaret Fetterolf, of Alexandria, Va., who family members say went missing in 1975. Baltimore County Police said new DNA testing showed Fetterolf was the girl...

There were arguments over food, helmets and spacesuits that required 30 minutes for astronauts to use the bathroom. By 1968, America's space program was on the brink. A launchpad fire at Cape Canaveral killed three astronauts as they...

Article reports on a speech given by a teen Martin Luther King, Jr. and its similiarities to his famous "I Have a Dream" speech. Includes a video.

Type 2 Diabetes, previously referred to as Adult Onset Diabetes, is the more common type. With type 2 diabetes, your body does not make or use insulin well. Risk factors include obesity and family history.

An article on Sensory Integrative Dysfunction. Beginning with a definition of sensory integration, the author goes on to trace the history of what is now called sensory integration and its dysfunction. Included here are discussions of...

Encyclopaedia Britannica provides a biography of Virginia Apgar, the creator of the Apgar Score System, an evaluation of the condition and viability of newly-delivered infants.

An article addressing how knowledge is acquired from different media formats. The article also discusses how scholars from the past asked questions about knowledge and launched their own investigations.

A comprehensive look at the theory of eugenics, the pseudo-scientific idea that fed into the nativists' search for the "superior" American. This article explains how companies used this theory to sell their products.

This article from "The New York Times" at Nuclearfiles.org recounts the ongoing debate about the first hydrgen bomb and who truly should be credited with its development.

This article, written for younger readers, explains cystic fibrosis (CF), an inherited disease that causes the body to produce mucus that's extremely thick and sticky.