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This term in Maths we have been studying time.  Last week when the Year 7s were at manual we had a go at making sundials out of an old CD and a CD case.

We used an app to find our lattitude in NZ, which is -36 degrees. That means that NZ is at an angle of 36 degrees compared to the equator, which is zero.  Then we used a protractor to make our CD sit at an angle of 36 degrees.  We pushed a toothpick through the middle of the CD so the sun could use it to make a rainbow-coloured shadow on the CD.  The rainbow-coloured line pointed to the time on the dial.

And guess what?  They actually worked!