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Archive for June, 2012

Maths Videos for Better Learning

June19

There are just so many instructional videos for Mathematics and they can really help you understand a topic you are learning at school. It is also a great way to hear a different voice than your own teacher’s every day! Head to YouTube or TeacherTube and type in the topic you are doing in maths […]

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Back to the Ski Slopes

June16

Yes, we are back on the mountain and trying to work out the speed of our skiers. We remember (from a Math lesson a long time ago) that Speed = Distance/Time. It was given to us in a triangle, something like this: To use this triangle, simply put your finger over the letter you are […]

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Proving the Pythagoras Rule

June16

The Rule of Pythagoras for right-angled triangles is a core part of most Junior High School Maths courses. It states that the area on the longest side (the hypotenuse) is equal to the sum of the squares on the other two sides: Pythagoras didn’t use algebra to express this theorem, of course. Algebra wasn’t developed […]

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Mathematics Words – Great Reference for all Students!

June16

This site offers you a really useful 1-stop shop to look up what those confusing mathematics words mean:

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Slope Dude!

June15

Not the best quality lesson on gradients but some students find it helps them remember the main concepts (from youtube and just over 2min):

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Some Common Maths Terms

June14

Like the guy below who got stuck on the fairly simple maths problem we sometimes get confused with the terms that are used in our high school maths courses. Here are the common ones: sum = + (add up) difference = – (subtract) quotient = division (another great Latin word!) product = multiply

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Can You Win the $16,000?

June12

Give yourself a minute to figure this one out, or phone a friend! Click on the image above to see what happened!

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5 Fridays, 5 Saturdays and 5 Sundays

June12

When July has 5 Fridays, 5 Saturdays and 5 Sundays it is called money bags. This year, July 1st is on a Sunday. When did the pattern above last occur?    

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M.I.A. or Maths in Action

June9

OK, wise student of Mathematics. You may be chuckling to yourself after another class and saying something like, “These stupid area questions! I’ll never have to worry about area.” Then you find yourself working for a grass company who have been contracted to lay grass inside a large cathedral. “Humbug“, you might add, “I’ll never […]

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I want to know why Maths works, not just how!

June8

ScienceDaily (Apr. 10, 2009) — research from Vanderbilt University has found students benefit more from being taught the concepts behind math problems rather than the exact procedures to solve the problems. The findings offer teachers new insights on how best to shape math instruction to have the greatest impact on student learning. Full article here!

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NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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