The mathematics behind telling the time
A sundial is a device that tells the time of day by the apparent position of the Sun in the sky. In the narrowest sense of the word it will consists of a flat plate, the dial and a gnomon which will throw a shadow onto the surface; lines marked onto the surface will indicate the time of day. Learn about the mathematics involved in making one.
Make a simple sundial. Explain the limitations of this type of sundial.
Make this type of sundial.
Look at all these different types of sundial
Learn about the problems with using a sundial, this is quite difficult language but see if you can pick out a few important pieces.
Research the history of sun dial development, is there a famous one near to you?
What mathematics is involved in measuring time from a sundial?
What other methods are there of keeping time? What mathematics is involved in these?
How did Switzerland become synonymous with time keeping?
A pair of scissors
A craft knife/scissors
A print-out of the two sundial templates