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Welcome to CAS Key Stage 3 (11-14 years)

Computing at key stage 3 is part of the national curriculum and is made up of three key areas:

  • computer science
  • digital literacy
  • information technology

Each component is essential in preparing pupils to thrive in an increasingly digital world.

Pupils will arrive at key stage 3 with differing knowledge and experiences of computing, so early assessment and intervention may be needed. Key stage 3 is a stepping stone for future qualifications and careers. Planning needs to cover all parts of the curriculum in sufficient depth so that pupils can make informed choices about their future.

Looking for Resources?

Check out our collection of resources to support you in teaching students at key stage 3.


CAS Tenderfoot is a collection of unplugged activities with a focus on key stage 3 that covers essential concepts of computer science.  This resource includes activities to support coding, data representation, theoretical computers and modelling exercises. 

Looking for help and guidance? Our communities can help with that...

Secondary Community

The Secondary community will schedule events across the year covering current issues and interest in the world of secondary computing and responding to the needs of the community.

Join our Secondary Community

Local Communities

CAS has a network of local communities across the UK run by our volunteer Community Leaders, specialising in offering relevant local support to teachers. Communities are either primary or secondary specialised or focus on both – called ‘Mixed Communities’.  

CAS Local Communities

Thematic Communities

We have a range of thematic communities which are based around different themes including AI & Physical Computing.

CAS Thematic Communities

Talk to our friends... 

Here is a selection of trusted organisations who will also support you in teaching computing at key stage 3:

Complete schemes of work including lesson plans, resources and assessment materials.

RaspberryPi Key Stage 3 Resources 

Presentations with recorded instruction and quizzes provided by topic.

Oak Academy 

Full units of work with lesson plans and supporting resources alongside one-off projects for the micro:bit programmable device.  Activities include example solutions and videos with many aligned to the Global Goals. 

micro:bit resources

Curriculum catalogue of courses and tutorials for independent learning.  Includes lesson plans for each interactive activity. 

Resources to support the knowledge and understanding through unplugged learning (computing without a computer).  Activities organised by theme and topic and include activity plans mapped to computational thinking, mathematics and literacy. 

Computing Unplugged 

A range of video content answering key questions in Computing with a focus on future skills and technologies. 

BBC Teach Content

Independent learning resources by exam specification and includes videos for threshold concepts and interactive quizzes and tests. 

BBC Bitesize 

Resources focussed on digital literacy including internet safety with lesson plans and supporting presentations and worksheets.

Project Evolve 

Computational thinking interactive challenges which can also be completed as a timed national competition.  Include interactive coding activities and multiple choicx quizzes and assessments. 

Bebras Challenges

Independent interactive activities where students can claim badges and points towards gold, silver and bronze awards.  All badge activities organised in citizen, worker, maker or entrepreneur categories. 

IDEA Award activities

Be Internet Legends is a multifaceted program that includes a fun and free of charge web-based game called Interland and an educational curriculum to teach children how to be safe and responsible explorers of the online world

Be Internet Legends