A blog about teaching and learning in a maths classroom.

Archives → March 2009

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What’s wrong with this protractor?

Monday, 30 March 2009 ·

It’s been a little quiet around here – mainly due to the busy time of term and sickness.

Anyway, I recently got a packet of protractors for my class.  Every one of them has a problem, maybe you can spot it.

Million, billion, trillion

Thursday, 12 March 2009 ·

I used to think that I knew what 1 billion was, i.e. 1 000 000 000 000.  Then a couple of years ago, I looked on Wikipedia and found there were two defintions: Long and short scales.

Pie Graphs - “when will I ever use this?”

Saturday, 07 March 2009 ·

Dilbert answers:

Bearing and airports

Thursday, 05 March 2009 ·

As part of a unit on Trigonometry, we review compass and true bearings before working with bearings in Trigonometry problems.
To start this review lesson, we looked at some images from Google Earth.

A story for Trigonometry

Monday, 02 March 2009 ·

A really easy way to create engagement when introducing a new topic is to explain some of it’s applications outside of the maths classroom.  For Trigonometry, I use an explanation of how I used trigonometry in a previous career to find the height of trees.