Boys die in Gaza beach shelling
A local Gaza media agency distributes images purportedly showing the moment boys playing on a beach were killed by shell fire. Paul Chapman reports. Subscribe: http://smarturl.it/reuterssubscribe More updates and breaking news: http://smarturl.it/BreakingNews Reuters tells the world's stories like no one else. As the largest international multimedia news provider, Reuters provides coverage around the globe and across topics including business, financial, national, and international news. For o
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1.4.9 Sample variance

It is worth noting that a special term is reserved for the square of the sample standard deviation: it is known as the sample variance.

The sample variance

The sample variance of a data sample x 1, x 2, …, xn is given by


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3 Subtraction rules – order matters

It’s important to remember that subtraction has different rules from addition.

For example, when you add up numbers, it doesn’t matter what order you add them up in. So 6 + 4 is exactly the same as 4 + 6. The result is 10 in both cases.

But in subtraction, order matters. So 6 – 4 is different from 4 – 6.

With the first, you start with 6, subtract 4, and are left with 2.

But with the second you start with 4 and if you subtract 6, which is a bigger number, you a
Author(s): The Open University

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18.366 Random Walks and Diffusion (MIT)
This graduate-level subject explores various mathematical aspects of (discrete) random walks and (continuum) diffusion. Applications include polymers, disordered media, turbulence, diffusion-limited aggregation, granular flow, and derivative securities.
Author(s): Bazant, Martin

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Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

3.3 Have I given due consideration to units of measurement?

Many mathematical problems include units of measurement. The measurement may be of length, weight, time, temperature or currency. The UK uses both metric and imperial units.

The table below gives the units of length that are in everyday use in the UK, but you may know some others.

MetricAuthor(s): The Open University

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Metals

Metals are extremely important to our daily lives. Metals are shown to be found in many places and important to the history of our civilization. Malleability, ductility, and conductivity are examined, along with methods for extracting metals from ores and blending alloys. Experiments demonstrate these various properties.

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CO 1069-286-217

The National Archives UK posted a photo:

CO 1069-286-217

Description: Moose hunting. Prince of Wales' tour of Canada, 1919, a volume of photographs published by the Canadian Pacific Railway

Da
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Children of Air India: Renée Saklikar
November 13, 2013 - Book Launch Join Renée Sarojini Saklikar as she launches her first book of poetry, children of air india: un/author ized exhibits and interjections (Nightwood Editions, $18.95). Renée will be available to discuss her life project and personalize copies of her book. Renée Sarojini Saklikar was 23 years old when her aunt and uncle were murdered on June 23, 1985 in the bombing of Air India Flight 182. In her first book of poems, children of air india: un/authorized exhibits
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mproving Reading Fluency
The first way to improve reading fluency is by recognizing sight
words that don't need to be sounded out phonetically. An English specialist recommends buying flash cards and creating reading activities in this clip.

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Song: "Peaceful World"
This professionally-made video features Scottish children singing the song "Peaceful World."  Photos and illustrations depicting peace  (children holding hands around a globe) and non-peace ( soldiers) are shown throughout the video.  (4:06)
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Subtracting Decimals with No Place Holder
In this is an easy-to-understand, brief video the instructor uses a sketchpad program to demonstrate how to subtract decimal numbers.  Several examples are modeled with emphasis placed on regrouping and lining up the decimals.

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Subtracting Decimals
This is a brief (approximately) two-minute video from Sal Khan about subtracting decimals using the problem: 9.005-3.6.

Mr. Khan uses computer software for demonstration. The screen is a little 'busy' so the viewer may want to open the screen to 'full screen' to see all more clearly.

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Subtracting Decimals - Word Problem
This video is from Sal Khan about subtracting decimals using the problem: Leo has $4,522.08 in his bank account. He deposits another $875.50 and then withdraws $300.00 in cash. How much is left in his bank account?

Mr. Khan uses computer software for demonstration. The screen is a little 'busy' so the viewer may want to open the screen to 'full screen' to see all more clearly. (02:18)

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Mr. Duey - Fractions Rap
This is an excellent, catchy rap by Mr. Duey with lots of examples and great visual effects teaching how to convert fractions to percentages and how to change improper fractions to mixed numbers. (2:35)
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Dividing Fractions
This is a lesson on how to divide fractions.The instructor uses a white board. He uses a great expression called 'flip and dip." (03:02)
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Basic Math: Lesson 6 - Video Clip #9 - Arithmetic of Fractions: Addition
Concepts covered: Addition of Improper and Proper Fractions and also Mixed Numbers.
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6.080 Great Ideas in Theoretical Computer Science (MIT)
This course provides a challenging introduction to some of the central ideas of theoretical computer science. It attempts to present a vision of "computer science beyond computers": that is, CS as a set of mathematical tools for understanding complex systems such as universes and minds. Beginning in antiquity—with Euclid's algorithm and other ancient examples of computational thinking—the course will progress rapidly through propositional logic, Turing machines and computability, fin
Author(s): Aaronson, Scott

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Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

Redefining the Wall: Architecture, Materials and Macroelectronics
As a principle element of architecture, technology has allowed for the wall to become an increasingly dynamic component of the built environment. The traditional connotations and objectives related to the wall are being redefined: static becomes fluid, opaque becomes transparent, barrier becomes filter and boundary becomes borderless. Combining smart materials, intelligent systems, engineering, and art can create a component that does not just support and define but significantly enhances the ar
Author(s): Ataman, Osman; Rogers, John; Ilesanmi, Adesida

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Rights not set

3.1.1 Inserting half-twists

We can insert half-twists into a paper surface whenever a piece of the surface is homeomorphic to a rectangle ABCD with the following properties:

the edges AB and CD of the rectangle map to distinct parts of the boundary of the surface, and the edges BC and DA of the rectangle map to non-boundary points of the surface.

As illustrated in Author(s): The Open University

Career Advice:  Instructional Designer
Instructional Design is the practice of creating experiences which make acquiring knowledge and skills more efficient, effective, and appealing.  (5:44)
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