Archive for the ‘direct proportion’ Category
3. How far can a biofuel Mini drive on 1 kg of human fat?
September 30, 2014Outdoor Maths Adventures: Grade 3 – 5
June 30, 2014This fab idea comes from Juliet Robertson, an outdoor education consultant in Scotland. Her blog Creative star learning is one of the most inspiring outdoor maths blogs you will find.
Check out Mathpig’s protractor joke here.
Another fab idea from Juliet Robertson.
Outdoor Maths Adventures: Middle School
June 30, 2014
Lego Man soccer fields will vary in size depending on the height of each player picked by each student. This does your head in. It is really challenging maths!
McGill Uni link here.
Don’t forget to throw in Mathspig’s lame protractor jokes.
You’ll find full calculations at the Maths is Fun blog.
You’ll find more fab outdoor junior and middle school maths activities at the terrific Maths and Movement blog.
Some students will discover their coordinate point is not on the grid. Students should then work out that they will need a different scale for the yaxis. You can get more inspiration at the Stand Again blog.
Get Ready for the Lego Olympics
February 23, 2012Get ready mathspigs. You need one Lego Man, Girl, Vampire or Alien each for this exercise. Now we are going to set out the Lego Olympics Athletics track.
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But this story of the Olympics begins with Carl Lewis, one of the greatest athletes of all time who won 9 Olympic Gold medals in 100m, 200m, relay and long jump.
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Carl Lewis
Mathspig needs to find out how big the Lego Olympics track would be. How? Easy.
Carl Lewis will be our standard Lego Man.
I chose Carl Lewis because he kindly gave me his autograph once when I sprinted in high heels across a ballroom floor at a sports dinner in Melbourne and beat all other journalists. It was my personal best in high heels, I think.
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This means everything at the Lego Olympics will be
1:50
of the real Olympics.
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The Lego Bird’s Nest Stadium @ Beijing will be 1/50th of the real Bird’s Nest Stadium. (Not the scale shown here). Pictures by Johor Bahru.
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The Lego Beijing Water Cube Swim Centre will be 1/50th of the Real Water Cube.
EXERCISE 1:
Now mathspiggies over to you. The first thing to do is calculate the Lego Olympic measurements (table below).
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EXERCISE 2:
Then mark out a Lego Olympics 100m sprint to scale and/or
draw a Lego Olympic track (in chalk, perhaps) and/or
step out a Lego Olympic marathon track and/or
make a pole vault pole to scale for your little Lego Man.
Or bring in a Lego Man/Girl/Pirate and step out the Marathon Track (840m to scale).
This little guy has to run 840 m!!!!! Wow!
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Structure 
Real Olympics 
Lego Olympics 
100m Sprint 
100m 
2m 
400m Sprint 
400m 

42 km marathon 
42,000m 

Olympic Pool Length 
50m 

Olympic Pool Width 
25m 

Olympic Rowing Course 
2,000m 

Equestrian Jump Height 
2m 

Approx Pole Vault Pole Length 
5.5m 

Javelin Length Men Women 
2.6m 2.2m 

Olympic Stadium Straight Segment Semicircle Radius inner Lane Lane Width 
84.39m 36.50m 2.5m 
Little Lego Men Need lotsa Lego Maths
February 1, 2012…………………………………………………………….
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There is a lot of maths in Lego, mathspigs, but rather than smash up bridges not to mention toes with 40 kg weights, here are some other cool ways to do LEGO MATHS.
You can make yourself into a Lego Figure like Mathspig, but first ….
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Ideally, students would measure their own Lego Man. Otherwise, use the dimensions shown and fill in the chart.
To calculate your Lego man conversion factor:
Lego Conversion Factor = Your Height mm/ Lego Man height mm
eg. Mathspig Height = 172 cm
Mathspig Lego Conversion = 1720/ 38.2 = 44.6
A full size Lego Mathspig is 172 cm, therefore a full sized lego Mathspigs legs would be:
Mathspig Lego Legs = 14.0 x 44.6 = 624.4 mm = 62.4 cm
Dimensions mm 
Lego Man Dimensions mm 
Your Real Dimensions mm 
Your Lego Man Dimension mm 
Height (Not including the round thing ie. the stub) 
38.6 

Head Height Top to chin 
8.5 
************ 

Neck 
1.2 
************* 

Torso Shoulder to hip (Swivel pt) 
14.9 
************ 

Leg Length Hip to Floor 
14.0 
************ 
Now you could draw or photo shop a real picture of yourself to these dimensions or – this is so cool – just make a Lego Man Pic of yourself @ Reasonably Clever
Zombie Maths 2: Direct Proportion
December 13, 201112 minute Maths Guru
July 4, 2011Meet Salman Khan. He has put free maths online.
This article on Salman appeared in The Sunday Times, UK, 12 JUN 2011.
Salman, 28, started putting tutes online for his 12yearold niece, Nadia, and things grew. So far the Kahn Academy’s claim to fame are:
* Over 2,400 videos including hundreds and hundreds of 12minute maths tutes
* Over 63,000,000 lessons delivered.
* Bill Gates kids use the site.
* A staff of 1 with funding from The Bill and Melinda Gates Foundation.
* Tutes on Biology, Chemistry and Physics too.
You can look up the maths tutes by topic @ The Khan Academy.
Or search topics on Youtube eg. Introduction to Conics Khan
Why Does Mathspig like The Kahn Academy? Because it’s:
1. Free.
2. Quick
3. Clear
4. Lowkey
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