04 – Cryptic Messages

Learn how the Germans used the Lorenz machine (the Tunny) to send secret messages using a binary code and tapes

Use this topic to introduce students to binary codes. Students will use a key to create their own binary codes, make a cipher wheel and write a coded message for a partner.



Each Challenge includes Teachers’ notes, Student Challenge sheets and a PowerPoint.

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  • 03 - Building Colossus

    Learn about the original blueprint for Colossus, how to read a map, design a blueprint and make a scale drawing.

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  • 05 - Cracking the Code

    Learn how to decipher different codes and work as a team to translate a message from German.

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