In this series of 3 lessons aimed at pupils in the first year of secondary school (KS3 Year 7 in England), students learn about cryptography and undertaking practical unplugged activities to develop their logical reasoning and problem-solving skills.
This unit forms the second part of the cyber security unit, though it can be used on its own and can be a good introduction to text-based programming, or a way to extend existing knowledge.
The lesson sequence comprises 3 lessons of approx. 60 minutes:
- Introducing cryptography today and in history (World War Two)
- Caesar cipher algorithms unplugged activity
- Creating Caesar cipher programs with text-based programming
- can understand and apply the fundamental principles & concepts of computer science (logic, abstraction, algorithms, real world problem analysis and problem solving).
- practical experience of writing computer programs to solve problems.
- are responsible, competent, confident and creative users of information and communication technology.
Lessons created in partnership with Nominet
Problem-solving, collaboration, critical thinking, creative thinking, prototyping, presenting, researching.