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Primary Magazine - Issue 16: Starter of the month

This page has been archived. The content was correct at the time of original publication, but is no longer updated.
Created on 28 September 2009 by ncetm_administrator
Updated on 30 October 2009 by ncetm_administrator

Primary Magazine Issue 16

Starter of the month

Code cracking!

As long ago as the Ancient Greeks, warring armies have encrypted their communications in an attempt to keep their battle plans a secret from their enemies.
One of the major breakthroughs in World War II was when code-breakers at Bletchley Park managed to break the Enigma Code and read all the messages sent by the Germans
Cracking codes and unravelling the true meaning of secret messages involves loads of maths, from simple addition and subtraction, to data handling and logical thinking.

Key Stage 1
Present the code breaker line and ask children to use the code to find the answers to the calculations:

Kesy Stage 1 activity code table

Kesy Stage 1 calculations activity

You can make up the calculations to meet the needs of your class.

code symbols

Here is a lovely activity from the New Zealand Fire, Ambulance and Police services.

Key Stage 2
Codes have been with us for centuries. When Julius Caesar was increasing the Roman Empire over 2 000 years ago, he would write messages to his generals in code.
Can you work out how to crack the code? Complete the table to find out how Caesar would encode the following message:

Kesy Stage 2 activity Caesar's message

Have a go at trying to work out these messages which could have been sent by Caesar or his generals. You may need to devise a table to help you.


(from NRICH)

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