Lewis and Clark's Expedition to the West
Video accompanied by text. "The Louisiana Purchase offered the United States much needed room to grow and access to an abundance of natural resources, waterways, and fertile farmland. Countless opportunities awaited the Americans, but they would first have to locate them. The Louisiana Territory was so large that France could not accurately define its contents or borders. Jefferson took advantage of the ambiguous agreement and asserted that it included the Missouri River, western Florida, New Or
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Designing an Invention, Fundamental Concepts
NASA Sci Files segment exploring the fundamental concepts to designing an invention including doing research and recording detailed observations. Produced specifically for students and is suitable for elementary and older students. 
(This is an Emmy award-winning series of instructional programs that introduces students in grades 3-5 to NASA and integrates mathematics, science, and technology through the use of Problem-Based Learning (PBL), scientific inquiry, and the scientific method.

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Napoleon Forced to Abdicate
The Sixth Coalition forces Napoleon into exile on Elba. Mr. Khan uses the computer software (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. Suitable for high school students. (16:22)
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French Invasion of Russia
The instructor, in an easy, conversational tone discusses Napoleon's disastrous invasion of Russia. Mr. Khan uses the computer software (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education.
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Napoleon's Peninsular Campaigns
The instructor, in an easy, conversational tone discusses how French forces get embroiled in the Iberian Peninsula. Mr. Khan uses the computer software (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education.
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Napoleon and the War of the Fourth Coalition
The instructor, in an easy, conversational tone discusses how Napoleon takes on Prussia and Russia and wins. Mr. Khan uses the computer software (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education.
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Singular Matrices
In this fourteen-minute video, the instructor explores when and why you can't invert a matrix.

Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. The student or educator may want to open the video to 'full screen' as the instructor is using a black background and the writing is small.

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Sign Language Made Easy
The award winning, American Sign Language Made Easy Series is the most complete series on signing ever produced. This 40-volume, educational video and DVD series teaches conversational sign language, in a fun and easy manner and is ideal for students, teachers and parents. The focus of this series is to teach students basic to advanced communication skills, vocabulary, finger spelling, the alphabet and grammar principles to be able to start signing and communicating easily and quickly.
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Mechanical Advantage and Friction
Professors A and B compare the mechanical advantage of an inclined plane with that of a lever. Eureka was a series of short cartoons on physics that ran on public television in the 1980's.  The video explains the concept in simple and well illustrated way.  Good for students of any elementary school level. 
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Mechanical Advantage - Pulleys
This video uses working simple machines to demonstrate how to calculate mechanical advantage. Suitable for any school program involving simple machines. Demonstrates pulley systems including a chain block.
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Introduction to Mechanical Advantage
Introduction to simple machines, mechanical advantage, and moments. This video, which is suitable for high school students, starts with a black screen because the instructor, in his conversational tone, uses it as a 'chalkboard.' Instructor uses different colors for clarification. Run time 10:02.
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Mechanical Advantage (Part 2)
More on mechanical advantage, levers, and moments. This video, which is suitable for high school students, starts with a black screen because the instructor, in his conversational tone, uses it as a 'chalkboard.' Instructor uses different colors for clarification. Run time 06:49.
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The Kidney and Nephron
This is an overview of how the nephrons in the kidney filter blood and re-absorb water and other molecules. Mr. Khan uses computer software (with different colors for clarification and emphasis) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education.
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Secondary Active Transport in the Nephron
The instructor continues with this discussion of the Secondary Active Transport in the Nephron. Mr. Khan uses computer software (with different colors for clarification and emphasis) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education.
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Teaching Reading With Proper Tone
In this clip learn about teaching children how to read with using proper tone. An award winning teacher discusses the importance of the tone in which you read to kids and learn.
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Choosing the Right Book to Read Aloud
An award winning teacher talks about how to teach a child to read
by reading aloud in this video.  In the clip the teacher talks about how to pick out a book that will teach your child the importance of reading with a purpose.

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Absolute Value Equation, Example 2
Sal Khan offers an example of solving an absolute value equation. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education.  (06:31) There is a lot of information on the screen--the viewer may want to open the video to 'full screen.' 
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Number Sets, Part 1 of 3
Using the question 'What number sets does the number 8 belong to?', the Mr. Khan explains the categories that numbers can belong to. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (06:06)
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Number Sets, Part 2 of 3
Using the question 'What number sets does the number 3.4028 (with the 28 at the end of the number repeating forever) belong to?', Mr. Khan explains the categories that numbers can belong to. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (06:52)
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Number Sets, Part 3 of 3
Using the question 'If x is a whole number, what other sets does x belong to?'. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (02:52)
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