Lesson 5: Understanding packets

In a practical activity, pupils learn how packet data is transferred and how it can become corrupted or lost

Before the lesson

Download classroom resources

Learning objective

  • To understand the role of packets

National curriculum

Pupils should be taught to:

  • Understand computer networks including the internet; how they can provide multiple services, such as the World Wide Web, and the opportunities they offer for communication and collaboration

Success criteria

Cross-curricular links

Attention grabber

Main event


Pupils needing extra support: Might need reminding of what to do when they receive a packet.


Pupils working at greater depth: Should remind others of the importance of ‘time to live’.

Wrapping up

Assessing pupils' progress and understanding


Created by:
Cat Lamin,  
Computing specialist
Cat was a committed primary school teacher for twelve years. After starting her independent consultancy ‘Crossover Solutions’ she has travelled to Argentina, Brazil and America to share her wealth of knowledge of computer science with other teachers. Her enjoyment for…
Find out more