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Cryptography
The subject of cryptography is of obvious interest to young
people, as it includes spying, intrigue, secrecy, the Enigma
cipher, mobile phones and the Internet. Furthermore,
is built on mathematics, so it can be used to illustrate
several aspects of the topic and its applications in the
real world. And because cryptography has such a long and rich history, there
is the opportunity to pick up on aspects of the history
syllabus, such as the Elizabethans or the Second World War.
I ran a Code Breaking
Day where the pupils
worked in groups of 3 and each group had access to a computer.
I
downloaded the Code Book (lite version) [which I put on a CD
to give each pupil to take home] and worked through some
exercises, which I selected from those on
www.simonsingh.net.
I mixed these in with some challenges which involved them
breaking a code and finding the answer somewhere around the
school using a map. At the end of the day they had a
period of time to explore one of the many techniques which we
hadn't covered from the CDRom which they had to explain to the
rest of the class. Next year I shall include more
challenges as these were really popular and helped the pupils
to find their way around the school. I intend to get the
pupils to write their own challenges.
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