Mathematics 24x7

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Colin McAllister's Page

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Bonifas liked Colin McAllister's blog post The Math Connection discussion group on LinkedIn
Apr 28, 2013
Purushottam Gautam joined Colin McAllister's group
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Math Problem Solving

Press "Start Discussion" to post your math problem here, or help others solve problems. Embed diagrams or equations in your text as images, if they improve the explanation.Click "View All" to see all the problems.See More
Mar 5, 2012
suresh kumar yadav replied to Colin McAllister's discussion When you are teaching or learning about symmetry, which examples do you use?
"all of the above and we can use books, duster, etc....."
Feb 4, 2012
padmarao parimala replied to Colin McAllister's discussion When you are teaching or learning about symmetry, which examples do you use?
"rangolis infront of our houses are the best examples used by us in our class room. padmarao s.a maths, zph school, narnepadu, guntur -a.p.india-522408. cell-9849851047"
Feb 2, 2012
Girishkumar Seshadri Rao replied to Colin McAllister's discussion When you are teaching or learning about symmetry, which examples do you use?
"All the above and even paper folding is used to convey the concept of symmetry "
Jan 25, 2012
tadepalli manjula replied to Colin McAllister's discussion When you are teaching or learning about symmetry, which examples do you use?
"All the above are used to explain symmetry. "
Jan 22, 2012
sidi gaberson replied to Colin McAllister's discussion When you are teaching or learning about symmetry, which examples do you use?
"I use 1 and three only cause we don't have enough equipment to visualize using microscopic structures e.g. crystals. But nonetheless, students were able to grasp the idea about symmetry..."
Jan 20, 2012
subhashree panigrahi replied to Colin McAllister's discussion When you are teaching or learning about symmetry, which examples do you use?
"of course I use all of the above. besides that we consider examples from the class room itself and things possessed by children. for example, blackboard, books, different shaped pencil boxes, the window, the roof arc etc.   "
Jan 20, 2012
subhashree panigrahi liked Colin McAllister's discussion When you are teaching or learning about symmetry, which examples do you use?
Jan 20, 2012
subhashree panigrahi liked Colin McAllister's discussion When you are teaching or learning about symmetry, which examples do you use?
Jan 20, 2012
Rashmi Kathuria replied to Colin McAllister's discussion When you are teaching or learning about symmetry, which examples do you use?
"All of the above. Apart from this children are asked to create ink patterns using thread and observe symmetry. Paper folding activities are also taken up to learn and explore the concept."
Jan 20, 2012
Peter John Watson joined Colin McAllister's group
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Math Problem Solving

Press "Start Discussion" to post your math problem here, or help others solve problems. Embed diagrams or equations in your text as images, if they improve the explanation.Click "View All" to see all the problems.See More
Jan 12, 2012
Colin McAllister posted a discussion

Link to Babylon and the Square Root of 2 by Baez and Elwes

Babylon and the Square Root of 2This blog post by John Carlos Baez and Richard Elwes, discusses the meaning of an important artifact from the history of mathematicshttp://johncarlosbaez.wordpress.com/2011/12/02/babylon-and-the-square-root-of-2/See More
Dec 24, 2011
Colin McAllister replied to kopalle sita mahalakshmi's discussion interesting powerpoint presentations in data handling, algebra, geometry.
"Kopalle, I have a number of geometry presentations on Slideshare.net, including this one about geometric construction: http://www.slideshare.net/cmcallister/inscribe-semicircle-in-square-by-geometric-construction Slide 17 by Linda is my favourite.…"
Dec 24, 2011
Colin McAllister added a discussion to the group Introducing Math Concepts
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What are the symmetry properties of a paper windmill?

If you take a square of stiff paper or thin card and cut and fold it to make a paper windmill, what does that teach us about symmetry? What if you begin with a regular hexagon instead of a square? You could post a photo of your construction to this forum, and explain how it works.See More
Dec 24, 2011
Colin McAllister posted a discussion

When you are teaching or learning about symmetry, which examples do you use?

1. From nature e.g. flowers2. Microscopic structures e.g. crystals3. Manufactured e.g. buildings or patterns4. All of the above5. None of the aboveSee More
Dec 19, 2011

Profile Information

Name
Colin
Philosophy of life
Pragmatic
Cyber House
http://cmcallister.typepad.com
Profession
Software Engineer
Your Inspiration
Isaac Newton
You in one line.
A Software Engineer with an interest in physics and mathematics.

Colin McAllister's Blog

The Math Connection discussion group on LinkedIn

Posted on December 18, 2011 at 3:29am 0 Comments

A discussion group with over 2300 members. Created by Andrei Radulescu-Banu for discussing mathematics in K-12, primary and secondary school. Do create your own topic for discussion. There is likely to be a quick response and active debate. This group is open to anyone on LinkedIn.

http://www.linkedin.com/groups?about=&gid=1872005

Exploring Discussion Forums - An article for free download - With thanks to members of this group

Posted on May 14, 2011 at 2:00am 0 Comments

Rebecca Hanson and I have just finished writing this article, inspired by discussions we had on this and other online forums. Talking about maths and education here motivates us to continue exploring the subject. We try to understand online discussions about mathematics education, and give  practical tips about using forums. Free PDF or DOC at:… Continue

Paper-Folding using Interactive Geometry Software

Posted on July 23, 2010 at 5:00am 1 Comment

Interactive geometry programs such as GeoGebra and CaRMetal are powerful tools for learning about geometry. You can use them to explore the basic principles of paper-folding (Origami). I learned about the mathematics of folding paper circles from:…

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Circles Inscribed In Triangles

Posted on June 19, 2010 at 9:30pm 2 Comments

I present some experiments with interactive geometry software on Slideshare.net at: Circles in Triangles using Geometric Construction. This follows on from my previous presentation:…

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Inscribe Semicircle In Square by Geometric Construction

Posted on April 12, 2010 at 4:13am 9 Comments

How would you inscribe a semicircle into a square using geometric construction? I prepared this slide show to demonstrate the steps of

construction. It can be viewed or downloaded at Slideshare.net:Inscribe Semicircle In Square… Continue

Comment Wall (4 comments)

At 3:12pm on April 20, 2009, Rashmi Kathuria said…
Welcome to Mathematics 24x7. The purpose of this network is to just talk about all possibilities in Mathematics .There are people who love this subject and at the same time there are ones who are struggling for it.
Let us join our hands and look for all possibilities to make it interesting for everybody.
Thanks for joining this network.
Keep Sharing.
At 1:35pm on April 12, 2010, Vijay Krishnan said…
Thanks for adding me mate! hope to hear from you soon....have a good one my man :)
At 10:31pm on October 18, 2010, Shahzad Karim said…
Thank you sir, for being the first to accept me as a friend, secondly, the problem you just launched (i-e: the largest semicircle inscribed inside a square), I tried to give a solution but It does not seem to be of my level since I'm just a 9th grader but my enthusiasm for mathematics knows no levels! I'll be grateful to you for being with me in future!
At 10:35pm on October 18, 2010, Shahzad Karim gave Colin McAllister a gift
Gift
hey sir, I saw your profile and amazed to know the great harmony I've found with you, I too want to become a software engineer in future and also my inspiration is Isaac Newton!!!

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