# MathsClass

A blog about teaching and learning in a maths classroom.

## MathsClass This Week 2 February 2013

Saturday, 02 February 2013 | 0 Comments

How could estimation or measurement stopped the problem the Griswold's had with their Christmas tree?

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A story that I use with my Year 10s each year about using Trigonometry “in the field”. I used to work in telecommunications, and used trigonometry to calculate the height of trees.

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The story of the number 1 is the story of Western civilisation. Terry Jones, of Monty Python fame, goes on a humour-filled journey to discover just what an amazing tale lies behind the simplest number we have. Using Pythonesque computer graphics, 1 is brought to life in all its various guises.

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A maths lesson activity with a toy car.The video shows the results when the car is pulled back 5 cm, 15cm and 25 cm.
In Part Two of the video, the results are shown when the car is pulled back 10 cm, 20 cm and 30 cm.My thought is that the teacher would show the first three results and make a table of the data. Then, make predictions for 10 cm, 20 cm and 30 cm.See mathsclass.net blog.

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href=“http://mathslinks.net/links/flaw-in-the-enigma-code-numberphile” class=“pull-left”> src=“http://static.mths.co/ceimg/sites_yt_thumbs/2910.jpg” width=“100” height=“75” class=“screenshot media-object img-polaroid” alt=“Screenshot of Flaw in the Enigma Code – Numberphile”> class=“media-body linkdescription”>

The flaw which allowed the Allies to break the Nazi Enigma code.

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The Nazi's Enigma Machine – and the mathematics behind it – was a crucial part of World War II.

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src=“http://static.mths.co/ceimg/sites/2906_100.jpg” width=“100” height=“75” alt=“Screenshot of Thirteen Ways of Looking at a Half” class=“screenshot media-object img-polaroid”>

href=“http://mathslinks.net/links/thirteen-ways-of-looking-at-a-half”>Thirteen Ways of Looking at a Half 31 Jan 2013 · via woojm

A simple game where you find thirteen ways to show one half.

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href=“http://mathslinks.net/links/hypatia-explores-the-locus-of-the-ellipse-to-explain-planetary-orbits” class=“pull-left”> src=“http://static.mths.co/ceimg/sites_yt_thumbs/2904.jpg” width=“100” height=“75” class=“screenshot media-object img-polaroid” alt=“Screenshot of Hypatia explores the locus of the ellipse to explain planetary orbits”> class=“media-body linkdescription”>

href=“http://mathslinks.net/links/hypatia-explores-the-locus-of-the-ellipse-to-explain-planetary-orbits”>Hypatia explores the locus of the ellipse to explain planetary orbits 28 Jan 2013 · via Nordin Zuber

5 minute extract from the film “Agora” – an imagined biography of Hypatia of Alexandria. Suggests Hypatia may have worked out the elliptical orbit of the planets around the sun (possible given her commentaries on Apollonius and work on astronomy – but history records this was done by Kepler 1300 years later). This YouTube version has subtitles burnt in – but other versions have poor sound.

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href=“http://mathslinks.net/links/carl-sagan-describes-keplers-discoveries-of-elliptical-orbits” class=“pull-left”> src=“http://static.mths.co/ceimg/sites_yt_thumbs/2903.jpg” width=“100” height=“75” class=“screenshot media-object img-polaroid” alt=“Screenshot of Carl Sagan describes Kepler’s discoveries of elliptical orbits”> class=“media-body linkdescription”>

href=“http://mathslinks.net/links/carl-sagan-describes-keplers-discoveries-of-elliptical-orbits”>Carl Sagan describes Kepler’s discoveries of elliptical orbits 28 Jan 2013 · via Nordin Zuber

5 minute extract from Carl Sagan's “Cosmos” series. Explanation of Kepler's Laws of Planetary Motion – with good mathematical description of ellipses.

### This week on href=“http://mathsfaculty.net”>MathsFaculty

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Content: Worksheet – Print · File type: PDF · 2 Feb 2013

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Content: Activity, Worksheet – Electronic, Worksheet – Print · File type: PDF, Word · 2 files · 2 Feb 2013

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Content: IWB · File type: SMART Notebook · 2 Feb 2013

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Content: Activity, Worksheet – Print · File type: PDF, Word · 2 files · 2 Feb 2013

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Content: Activity, IWB, Projector, Worksheet – Electronic, Worksheet – Print · File type: Excel, PDF · 4 files · 2 Feb 2013

### This week on href=“http://mathskit.net”>MathsKit

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href=“http://mathskit.net/#2907”>SMART Notebook Express

Posted in • MathsClassMathsFacultyMathsKitMathsLinksSoftwareExcel | Short URL: http://mths.co/2920

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Simon Job — ninth year of teaching maths in a public high school in Western Sydney, Australia.
MathsClass is about teaching and learning in a maths classroom. more→

@simonjob