Systems Of Equations With Fractions - Using Substitution
In this video lesson, students learn to solve systems of linear equations that involve fractions. Students also learn to solve linear systems of equations by the method of their choice using the following rules: if one of the variables cancels out when the equations are added together, then use addition, and if a variable is already isolated in one of the equations, then use substitution.
 (3:23)

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Simplifying Rational Expressions
This video walk the learner through the steps to simplify rational expressions.  Specific circumstances are discussed and several problems are modeled.  
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Adding and Subtracting Rational Expressions
In this video, the instructor talks about adding and subtracting rational expressions.  He first defines what rational expressions are and how they are different from equations.  In general, the instructor states that the idea is to make the expression into a single fraction if possible.  The instructor walks the viewer step by step through three different examples of adding and subtracting rational expressions.

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Basic Algebra : How to Write an Algebraic Expression
Writing an algebraic expression in mathematics involves any combination of variables or letters and numbers. Understand the concept of algebra and its flexible expressions with insight from a math teacher in this video on mathematics.

Expert: Jimmy Chang
Bio: Jimmy Chang has been a math teacher at St. Pete College for nearly a decade. He has a master's degree in math, and his specialties include calculus, algebra, liberal arts, math and trigonometry.
Filmmaker: Christop

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Simplifying Rational Expressions
In this teacher created video, the teacher defines a rational expression.  Then the teacher models the steps of simplifying the rational expression on a white board. ( 1:26)
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Wind Farms
Farmers look at wind energy as a way of going green.

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How to Study Spelling
How to Study Spelling. Part of the series: Math Lessons and Study Tips. In order to study spelling for a spelling test or for general knowledge, it can be helpful to read books about words that are commonly spelled incorrectly. Use reference books when studying spelling with help from this author and tutor.
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Qualifications and Qualities
To become president of the United States, a person does not need to meet a long list of qualifications. In fact, the Constitution outlines only three requirements; a president must be 35 years old, a natural-born citizen of the United States, and must live in the United States for 14 years prior to taking office. (Video is narrated with slides and speeches.)

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WHO AM I? from Les Miserables
This is a live performance of the 10th Anniversary Concert of Les Miserables. While the singers are in costume, this is not a stage production of the musical. The orchestra and singers are both on stage together with the orchestra behind the singers. This is a very interesting live concert production with occasional excerpts of footage from the stage production. Sung in English with English captions. (2:48)
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Stars from Les Miserables
This is a live performance of the 10th Anniversary Concert of Les Miserables. While the singers are in costume, this is not a stage production of the musical. The orchestra and singers are both on stage together with the orchestra behind the singers. This is a very interesting live concert production with occasional excerpts of footage from the stage production. Performance is sung in English with English captions. (3:29)
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Hypnotic Dissociation and Pain Relief
Describes what goes on during hypnosis and looks at states of consciousness, hypnosis as a phenomenon, and the therapeutic use of hypnosis in treating arthritis.
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How to Find the Surface Area of a Triangular Prism
Looking for an informative video on how to get the surface area of a triangular prism? This useful tutorial explains exactly how it's done in four minutes. The instructor uses a small whiteboard for demonstration.


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We Stand on the Shoulders of Giants - Labor Leaders
Tribute to historical leaders of the U.S. Labor Movement.An amateur video that morphs labor leaders' faces. Slides, text, and music are used.

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Internet Tip: Google Shortcuts
Google searching shortcuts to help you get the most out of your searches.  Some are weather, stocks, phonebooks, tracking information, definations of words, movie locations and times, calculations, and more. (8:03)
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Gray Langur Monkeys
This short video is all about the Gray Langur Monkeys of India. Travel
with the explore team of explore.org as they document these incredible
creatures, native all across India. They can be spotted in the jungle,
countryside, or rooftops and streets of the city. Enjoy!

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Human Rights in the 21st century: problems and prospects [Audio]
Speaker(s): Kenneth Roth | In the past decade, Human Rights Watch has emerged as one of the leading human rights organisations in the world, its reports increasingly acclaimed for their accuracy and for the depth of their human rights advocacy. Executive Director Kenneth Roth discusses the human rights landscape in the Centre's annual Human Rights Day lecture: What have been the main challenges that Human Rights Watch has faced as it has worked to achieve this position? How has the organisation
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Skills, Rights and Resources in the East Asian Path to Development [Audio]
Speaker(s): Professor Kenneth Pomeranz | This lecture traces evolving relationships among skills, bargaining power, and East Asian economic development. Kenneth Pomeranz is UCI Chancellor's Professor of History at the University of California-Irvine.
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A Billion People Decide their Future - a panel discussion on Indian Elections [Audio]
Speaker(s): Lord Professor Meghand Desai, Dr Sharmila Bose | The fifteenth General Election in India, the world's largest democracy, with currently 714 million registered voters, is happening in five phases between 16 April and 13 May. The panel will discuss the most exciting election in India since Independence.
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The Red Flag: Communism and the Making of the Modern World [Audio]
Speaker(s): Dr David Priestland | Communism was one of the most powerful political and intellectual movements of the modern world, and its collapse in 1989 had an enormous impact on our views of international affairs and economics. David Priestland argues that we have found it difficult to understand Communism, and the lessons we have learnt have contributed to many recent policy failures, from the 'War on Terror' to extreme neo-liberal economic policies. He revisits the history of Communism, ex
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IGC Growth Week 2010 - Reforming Educational Systems [Audio]
Speaker(s): Professor Michael Kremer, Professor George Imbanga Godia, Professor Geeta Kingdon, Dr Lansana Nyalley, Professor James Tooley | Michael Kremer discusses issues surrounding reform of education systems in developing countries based on evidence from studies on incentive mechanisms, peer effects and other interventions.
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