Archimedes' Principle
This video explains how to calculate the weight of a horse using Archimedes' Principle.Â  Includes a demonstration with digital scales and an overflow apparatus. The forces acting on hot air balloons, cargo and cruise ships is explained by this principle from the ancient Greeks.
Marine architects and engineers use this basic principle to design floating structures - ships, submarines and oil rigs.
Suitable as a learning resource for an introduction to buoyancy and Archimedes in physi

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India: Land of the Tiger
This video explores the strange and mysterious world of the tiger.  The video is filmed in Central India.

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The Judicial Branch Part1
A ten minute video that gives an introduction into the Constitution. They use Pennsylvania as an example and goes through some comments that students have problems understanding such as not having to testify against yourself. This is a good preview of the Judicial Branch for students.

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United States of America, Part 1
First part of a very simple (early education) but informative introduction to the United States, a picture and a few words per slide. This part covers the government and some states, regions, and national symbols.
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United States of America, Part 2
Second part of a very simple (early education) but informative introduction to the United States, a picture and a few words per slide. This part covers Alaska, Hawaii, extremes, some cities and what they're famous for, and freedom.
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Defining Federalism
Has printable version as well. Good introduction to this subject. Definitions used are easy for students to understand. Shows views of Federalists and Anti-Federalists. Also explains reasons for Federalist Papers and some specifically mentioned.

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What is a Differential Equation?
This clip provides an introduction to Differential Equations. Â Includes an overview of many different types of algebraic equations and how they are alike and different than differential equations. Â Discusses derivative form, differential, form, and differential operator form, and how to solve differential equations in these forms.
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Organic Chemistry: Alkynes Introduction
Here is a brief introduction to alkynes.Â  Video gives a definition of alkynes and what they contain.
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Jazz - Excerpts from the Ken Burns Documentary-Introduction
Jazz is a uniquely American form of music.Â  It is a combination of all different types of music and cultures. It is an improvisational art that is forever changing, but deeply rooted in the blues. Ken Burns examined its history, and stars, in a documentary which aired on PBS.
This clip is from the introduction to the program. (8:05)

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Also sprach Zarathustra by Richard Strauss (Part 1)
This tone poem begins with its most familiar part, called "dawn," "sunrise," or just "introduction." It is the theme to Stanley Kubrick's 1968 film "2001: A Space Odyssey." Used ever since to indicate the feeling of something happening on a grand scale, including the television transfer of Mike Teavee in the 2005 film "Charlie And The Chocolate Factory."Â  This performance is by the Staatskapelle Dresden, conducted by Giuseppe Sinopoli Jan., 24, 1998 at the Suntory Hall in Tokyo, Japan.
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How Do I Teach 4th Grade Narrative Writing?
When teaching fourth grade narrative writing, use peer conferencing and break down the construction of a story by discussing the introduction, body and conclusion. Teach fourth grade narrative writing with tips from a credentialed teacher. (2:22)
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An Introduction to Pop Art
This video is a very good introduction to the pop art style as well as a number of great pop artists. Â The video begins with a narration that introduces some of the leading pop artists of the world. Â The video continues by showing the works of these artists and talking about what their artwork represents.
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Introduction to Bonds
The instructor, in an easy-to-understand, conversational tone,Â offers an introduction to company bonds. He uses computer software for demonstration.
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This video introduces descriptive statistics and central tendency. Examples are shown on a black board ofÂ the average of central tendency: mean, median and mode.

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Gear Basics
This videoÂ is designed to provide a basic introduction to gears suitable for grades 4 to 9. Gear rotation, gear ratio, rates of rotation, mechanical advantage and examples of use are included. A second video, " Time, Clocks and Gears" explains how gears are used in mechanical clocks to control the hands on an analog clock.
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Pollinators and Pollination
This 4 minute slide show is set to soothing musicÂ with labels for each picture. Students must be able to read the labels (not narrated). Bright, colorful pictures depict various pollinators (bees, butterflies, hummingbirds, flies, wind etc).Â  Parts of the flower (stamen and stigma) are briefly addressed at the beginning of the show.Â  This would make a nice introduction to pollination even at the lower grade levels. Run time -3:56.
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Mobilizing the US Nation for War
n April of 1917, President Woodrow Wilson received a declaration of war from Congress. Even as America prepared for war, the country remained split over the prospects of sending American troops to fight the nations that comprised the Central Powers. In an attempt to unify the nation, the Wilson administration undertook a remarkable propaganda campaign to sway American opinion toward intervention in the European conflict. The centerpiece of this campaign was the Committee on Public Information, a
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The Treaty of Versailles
Nearly one year after President Woodrow Wilson addressed Congress and laid out his Fourteen Points, fighting in Europe had reached its end. In the last weeks of the war, Wilson used the promise of his Fourteen Points to persuade the German people to overthrow Kaiser Wilhelm II and establish an armistice. Under the armistice, Germany had to withdraw behind the Rhine River and surrender its submarines and munitions.
To establish the conditions of surrender for the defeated Central Powers, me

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Demographics
Demography is the study of the characteristics of the human population, such as age, race, and gender. Political scientists use demography to identify and study specific target groups to determine who shows up at the polls versus who does not. In addition, these demographic groups enable political scientists to study voting trends, or what causes people to vote a particular way. Their studies not only yield statistics that can be used to forecast voter turnout in subsequent elections, but they a
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Don't Know Much About 14th Amendment
This videoblog is about the 14th Amendment to the Constitution. Ratified after the Civil War, the 14th Amendment is one of the three Reconstruction Amendments and it granted full citizenship rights to former slaves. It also established the very important judicial concepts of due process of law and equal protection. Both of these clauses have been central to some of the most important Supreme
Court decisions in recent history including Brown v Board of Education and Roe v Wade. What is esp

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