A continuous range of frequencies of electromagnetic radiation, such as that produced when white light is refracted through a prism.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds...

(June 25, 1876) - George Armstrong Custer and the U.S. 7th Cavalry converge on the Little Bighorn River to corral the rebellious Lakota Sioux, Northern Cheyenne and Arapaho. After discovering the location of Sitting Bull’s village,...

Top Kremlin official's chilling nuclear warning as treaty due to expireCredit: Dmitry Medvedev's Secretariat

Constitution Day takes place every year on September 17. It celebrates the written document that outlines the rights and freedoms of U.S. citizens.

Mr. Beat explains why the Constitution still matters today. Constitution Day is September 17th.

Explore Constitutional Amendments 16 through 20 and understand why the Bill of Rights was a necessary addition to the Constitution. Detailed explanations of the amendments are presented with landmark cases and an analysis of each...

Explore Constitutional Amendments 21 through 24 and understand why the Bill of Rights was a necessary addition to the Constitution. In-depth explanations of the amendments are presented with landmark cases and an analysis of each...

This is a great resource for PHSE and Literacy. Students will learn the classic stories from Aesop’s Fables as well as being able to take on board the moral and social decisions being made by the characters of each story. This story...

Qué Tiene De Especial La Nariz De Un Perro?

Discover the unique hoodoo rock formations in Utah's Goblin Valley State Park, often compared to the landscape of Mars.

In this video, students will learn about the establishment and role of the executive branch of the United States government. The video explores how the executive branch was established through the Constitution and the concept of...

The video discusses the process of becoming President of the United States, including the constitutional requirements, the steps in the election process, and the role of the Electoral College. It provides a basic understanding of how...

MOT 1940: ADDRESS TO AMERICAN YOUTH CONGRESS: President Franklin D. Roosevelt (1882-1945) (SOT) 'It has been said that some of you are communists... very unpopular term... no American right... to subvert the Government & the...

Let’s get excited about veggies! This craft video celebrates the wonders of broccoli and teaches kids how to draw the delicious veggie with step-by-step instructions. Broccoli doesn’t have to be boring, especially when Playlearning!

TV executive Lauren Zalaznick thinks deeply about pop television. Sharing results of a bold study that tracks attitudes against TV ratings over five decades, she makes a case that television reflects who we truly are -- in ways we might...

What Cramer's rule is, and a geometric reason it's true

The U.S. Presidential Oath of Office, delivered through the presidents of the past

Pupil outcome: I can represent a 3-digit number up to 199. Key learning points: - Numbers can be written as digits. - Numbers can label a set of objects. - Numbers can label a position on a number line or scale.

On this episode of Breaking Trail, Coyote and the crew discover some REALLY HUGE Garter Snakes on the edges of the Lake Erie Islands! Part One

Exploring Our Nation:

Donald Trump: The 45th President of the United S

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After beating out 16 candidates in the Republican Primary and securing 304 electoral college votes, Donald John Trump became the...

The Supreme Court’s responsibility is to interpret all laws and ensure that they do not conflict with the founding principles of the Constitution. The Supreme Courts role in government has not always been as clear cut as it is now,...

Nancy Mowll Mathews, the Eugénie Prendergast Senior Curator of Nineteenth and Twentieth Century Art, Emerita, at Williams College Museum of Art, discusses the relationship between George Bellows and early film. With the growth of early...

The Greek historian and father of history, Herodotus, notes that the city was founded by the sons of Hercules, the Heraclides.The earliest reference to Sardis is in The Persians of Aeschylus (472 BC); in the Iliad, the name Hyde seems to...

A highly-secretive program, the United States Federal Witness Protection Program protects witnesses before, during, and after a criminal trial. Also called the Witness Security Program (WITSEC), the program is a joint venture of the US...