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Function Inverse Example 1
Function Inverse Example 1: f(x)= -x+4
This is a continuation of Mr. Khan's Introduction to Function Inverses. 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. The screen gets busy (and dark)--the viewer may want to open to 'full screen' to see everything. The sound is a little low. (06:43)

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Function Inverses Example 2
Function Inverse Example 2: f(x)= (x + 2) squared +1
This is a another installment of Mr. Khan's short 4-part series on Function Inverses. 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. The screen gets busy (and dark)--the viewer may want to open to 'full screen' to see everything. The sound is a little low. (07:12)

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Function Inverses, Example 3
Function Inverse Example 3: f(x)= (x - 1) squared -2
This is the last segment of Mr. Khan's short 4-part series on Function Inverses. These installments started with Khan's Introduction to Function Inverses. 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. The screen gets busy (and dark)--the viewer may want to open to 'full screen' to see everything. The sound is a l

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Matrix Multiplication (Part 1)
The instructor demonstrates how to multiply two 2x2 matrices. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. 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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Matrix Multiplication (Part 2)
The instructor uses an electronic chalkboard to demonstrate Matrix Multiplication.  At the time of this posting from WatchKnow, this video was a Featured Video on YouTube. The instructor, Sal Khan, continues from Part 1 on multiplying matrices. 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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Algebraic Word Problem
In this video, Sal Khan demonstrates how to solve an algebra word problem.  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.  (08:01) There is a lot of information on the screen--the viewer may want to open the video to 'full screen.' 
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Mixture Problems, Part 3
The instructor in this video, Sal Khan, continues to discuss solving mixture problems. This problem involves percentages and how to use a table to help solve the problem. 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. 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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Mixture Problems, Part 2
The instructor in this video, Sal Khan, continues to discuss solving mixture problems. This problem involves percentages and how to use a table to help solve the problem. 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. 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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Mixture Problems, Part 1
The instructor in this video, Sal Khan, introduces his discussion on how to solve mixture problems. The video is clear and easy to understand. 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. 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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Italians in the world - part 2
This episode discusses Father Bandini, an Italian emigrant, who can to the United States with his parishioners.  They import seeds and grubs from Italy and plant new land.  There apples, corn, and onions become famous.  Francesca Cabrini also emigrates she will be a saint, the first American saint.  Life is hard for all those who emigrated, even for a saint.  The Church in the States if formed mainly by Irish priests and it is not open to the new emigrants.  S
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Decomposition of the Body
Documentary- Click off the crime show and foray into the real world of forensics. At a unique open-air crime lab known as the Body Farm, decomposing corpses help detectives solve murders. Addresses decomposition and decomposers, however images of decaying bodies may be extremely disturbing for younger children. Run time 03:37

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Ali Baba and Forty Thieves Part 1 of 2
Animated cartoon of the old Persian tale.  The young Ali Baba collects valued fire-wood in the forest and happens to overhear a group of forty thieves visiting their treasure store in the forest where he is cutting wood. The treasure is in a cave, the mouth of which is sealed by magic. It opens on the words "Open, Simsim" (commonly written as "Open Sesame" in English), and seals itself on the words "Close, Simsim" ("Close Sesame"). When the thieves are gone, Ali Baba enters the cave himself, an
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Ali Baba and the Forty Thieves, Part 2 of 2
The young Ali Baba collects valued fire-wood in the forest and happens to overhear a group of forty thieves visiting their treasure store in the forest where he is cutting wood. The treasure is in a cave, the mouth of which is sealed by magic. It opens on the words "Open, Simsim" (commonly written as "Open Sesame" in English), and seals itself on the words "Close, Simsim" ("Close Sesame"). When the thieves are gone, Ali Baba enters the cave himself, and takes some of the treasure home.  Female
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Norse Mythology: Day and Night, Sun and Moon

At first the world was a dark and gloomy place, even with the great open sky.  The Gods had to create the sun and the moon.  They also had to invent day and night to make his time better.  Night was the daughter to Narfi, she was beautiful creature.  Night and her second husband had a daughter named Earth.  Night and her third husband named Dawn and they had a fair hair shining sun named Day.  The sun and t
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Weather & Meteorology : How Do You Measure Rainfall?
Rainfall is most commonly measured with a rain gauge, which can usually be found at an outdoor store or discount store. Discover why rain gauges need to be strategically placed in the open with help from a meteorologist.  Video is short and good quality and is appropriate for elementary level students of grades three through five.
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Ballet Lessons : How to Stretch for Leg Splits
Stretch for a leg split in ballet by warming up the hamstrings and hips with all of the plies, and do a hamstring stretch starting with the knees on the floor and moving in to a split stretch. Stretch the hamstring forward and keep the hips warm and open for the splits with help from an experienced dance instructor in this free video ballet lesson. (1:23)

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Last Months of Beethoven's Life
The last months of Beethoven's life were eventful.  On the 29th of July, 1826, his nephew Karl tried to commit suicide.  He survived a self-inflicted shot to his head.  Already ill himself, Beethoven accepted his brother Johann's invitation to visit his estate at Gneixendorf (in lower Austria).  A two-day journey from Vienna, Beethoven thought the change of scenery would be good for Karl.
The brothers, however, had serious arguments - on various issues - and Ludwig decided to abruptly

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Amazing Math Tricks
This slide show gives you step by step instructions on math tricks, most using a calculator for help.  There are 21 tricks in all.  A common trick is the "birthday trick".  It starts with the instructions to "Add 18 to your birth month.  Multiply by 5. Subtract 333. Multicply by 8.  etc."  At the end of the instructions, you should have the number of your birthday.  The viewer will have to stop the slide show to do the math tricks. The viewer will also have to open the video/slide show to
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(1/9) The Warsaw Uprising
The Normandy beaches were chosen by planners because they lay within range of air cover, and were less heavily defended than the obvious objective of the Pas de Calais, the shortest distance between Great Britain and the Continent. Airborne drops at both ends of the beachheads were to protect the flanks, as well as open up roadways to the interior. Six divisions were to land on the first day; three U.S., two British and one Canadian. Disorganization, confusion,
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The Effects of Industry
This video is accompanied by text. "Early American factories were usually owned by individuals, families, or partners. As mechanization became more widespread and the scale and complexity of businesses increased, a substantial capital investment was required to open a factory. Although it was a slow process, these factors led more and more firms to “incorporate” ownership.
Prior to the 1860s, most manufacturing was conducted by unincorporated companies. Organizing a corporation requir

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