Factoring Differences of Squares - Yay Math
Using the difference of squares method to factor polynomials. White board in a class setting, some interaction, engaging, several examples of increasing complexity. The discussion is clear and understandable. Preview - full version at http://video.google.com/videoplay?docid=692593011638794540&q=source:012956945238798337823&hl=en Produced by Robert Ahdoot, yaymath.org
Author(s): No creator set

When solar radiation enters the earth's atmosphere, because of the curvature of the earth it warms different regions of the atmosphere to differing extents â€“ most at the equator and least at the poles. Since air tends to flow from warmer to cooler regions, this causes what we call winds, and it is these air flows that are harnessed in windmills and wind turbines to produce power.

Wind power, in the form of traditional windmills used for grinding corn or pumping water, has been in use
Author(s): The Open University

La version itÃ©rative de notre algorithme d'alignement optimal de sÃ©quences est indÃ©niablement beaucoup plus efficace que sa version rÃ©cursive, puisque nous avons vu qu'il permettait d'Ã©viter que le coÃ»t d'un mÃªme nÅ“ud soit rÃ©Ã©valuÃ© plusieurs fois.
Mais qu'en est-il vÃ©ritablement de l'efficacitÃ© de cet algorithme ? Eh bien encore une fois, ...
Author(s): No creator set

Telling Time to the Hour with Analog Flower Clock
This animated video uses a flower as a clock. Each of the twelve petals is a number on the clock. There is musical accompaniment for the video as the narrator explains how to tell time to the hour. The hands move around the flower clock to illustrate each time described. (2:09)
Author(s): No creator set

Telling Time
Using the 3 o'clock hour, the demonstrates what twenty to three looks like, ten to three, five after three, etc. (01:10)
Author(s): No creator set

Battle of Britain Newsreels - World War II
Battle of Britain is the name commonly given to the effort by the German Luftwaffe to gain air superiority over the Royal Air Force (RAF), before a planned sea and airborne invasion of Britain (Operation Sealion). This video contains black and white newsreel footage from 1940 and 1941 documenting the air battles.

Author(s): No creator set

Ann Cooper Talks School Lunches
19:38 Video Speaking at the 2007 EG conference, "renegade lunch lady" Ann Cooper talks about the coming revolution in the way kids eat at school -- local, sustainable, seasonal and even educational food.
More: http://www.edu-cyberpg.com/NCFR/health.html

Author(s): No creator set

Chloroplast
This short, animated video is aÂ biology group project where students were asked to make a commercial about an organelle in a plant cell. The chloroplast inÂ this commercial is a restaurantÂ called "Le Chloroplaste". The "chef" explains what ingredients he uses to make gluclose in the process of photosynthesis. Run time 01:04.

Author(s): No creator set

Introduction to Factoring Trinomials - Yay Math
Removing common factors and using FOIL to reverse engineer trinomials to find the factors. White board in a class setting, some interaction, engaging, several examples of increasing complexity. The discussion is clear and understandable. Preview - full version at http://video.google.com/videoplay?docid=5372924760957296665&q=source:012956945238798337823&hl=en Produced by Robert Ahdoot, yaymath.org
Author(s): No creator set

Natural Selection and Darwin
This six minute video expands on the explanation of natural selection and the theory  by Charles Darwin that states that in a population, organisms with a genetic trait that increases the chance of having offspring will pass on their genes to the next generation mor than those without it. The narrator uses several examples to make his point.
Author(s): No creator set

The first formal, peer-reviewed, publication of part of Pusztai's work came in the Lancet in October 1999. Pusztai and his co-author Stanley Ewen had developed the work to include measurements on the effect of GNA potatoes on the structure of the rat intestine. They were looking for any effect of the GM diet on the mucosal cell layer lining the gut. Any increase in thickness would indicate that the diet had prompted increased growth of these layers, seen as a deleterious effect. In the
Author(s): The Open University

• All active galaxies have a compact, energetic nucleus - an AGN.

• Seyfert galaxies are spiral galaxies with bright, point-like nuclei which vary in brightness. They show excesses at far infrared and other wavelengths, and have strong, broad emission lines.

• Quasars resemble very distant Seyfert galaxies with very luminous nuclei. They are variable. About 10% are strong radio sources thought to be powered by jets of material mo
Author(s): The Open University

So what are the principle energy systems used by humanity at present, and how sustainable are they?

Until quite recently, human energy requirements were modest and our supplies came either from harnessing natural processes such as the growth of plants, which provided wood for heating and food to energise human or animal muscles, or from the power of water and wind, used to drive simple machinery.

But the nineteenth and twentieth centuries saw a massive increase in global energy us
Author(s): The Open University

Up to now I have focused on the claims of the antisweatshop movement and the counter-claims of those who contest the purely negative conclusions drawn about the exploitation of another country's poor. To that end, I have, at various moments, touched on issues of demands to take responsibility: whether, for instance, responsibility for sweatshops should be divided up in some way between all those connected to the market system which gives rise to them, or placed firmly at the door of the big r
Author(s): The Open University

The critical event for the transduction of sound into a neural signal is the bending of the stereocilia of the hair cells. In this section we will examine how the flexing of the basilar membrane leads to the bending of the stereocilia and the production of a neural signal.

Author(s): The Open University

This free course provided an introduction to studying Science. It took you through a series of exercises designed to develop your approach to study and learning at a distance and helped to improve your confidence as an independent learner.

Author(s): The Open University

Within some of the lineages of systems thinking and practice (Figure 7), the idea that system complexity is a property of what is observed about some â€˜real-worldâ€™ system, is known as classical or type 1 complexity. Exploring type 1 complexity, Russell Ackoff (1981, pp.26â€“33) claimed for a set
Author(s): The Open University

Visual Learning Bridge: Elapsed Time for Younger Learners
This is an screencast of a software program that shows young learners how to solve elapsed time. (02:44)
Author(s): No creator set

Converting Fractions to Percent
This video is about a learning trick to help to learn how to convert fractions into percent. (01:34)
Author(s): No creator set

Politics in 60 seconds. Utopia
Dr Lucy Sargisson defines a polical concept in 60 seconds for those with a spare minute to learn something new. This videocast focuses on Utopia as a political concept. Warning: video does contain bloopers and out takes. May 2010 Suitable for Undergraduate study and Community education Dr Lucy Sargisson, School of Politics and International Relations Dr Lucy Sargisson is an Associate Professor of Politics at the University of Nottingham. She is an active member of the profession, serving on
Author(s): Sargisson L. M. Dr