Teach Computing

Revision notes, activities, lesson plans, teaching ideas, and other resources for GCSE, A-Level, and IB Computer Science teachers and students.

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UK Computing Laws

This video from Computer Science Tutor covers the main UK computing laws re...

Wireless Networking (Wi-Fi, Security, and Hardware)

This video about wireless networking includes everything that is needed for...

Network topology videos

These four excellent videos from Computer Science tutor cover the four ma...

Network protocols

These four videos explain the main networking protocols that students are l...

Embedded Systems video

This short video is a good over of embedded systems, covering the main poin...

Representing Text in Binary

This video clearly explains the two main ways of representing text in binar...

Types of Malware

This video explains the various types of malware including viruses and troj...

Protecting against Malware

Following on from the Types of Malware video, this video explains technique...

Video: Network Security #1

This video gives an overview of the threats to networked computer systems, ...

Resources discount offer

1.2 System Design Basics

Click here for recommended IB Computer Science textbooks.

Components of a computer system

Internet protocols

What Happens When You Click a Link?

This video explains step by step what happens when you enter a URL in your web browser. It covers looking up the IP address using the HOSTS file or DNS, connecting to the destination machine using TCP/IP, and using HTTP to fetch the page. It does a good job of breaking down the process into a series of simple steps that demystify this process for students (hopefully!).


Updated: 2015-05-02
How DNS works

How the DNS works

An animation showing how DNS works when you type the URL of a website into your web browser. This video goes into more detail than some of the others here, showing how a computer locates nameservers before finding the IP address of a domain name. Useful for older students.


Updated: 2015-06-03
DNS Explained

DNS Explained

This video goes into a LOT of detail about DNS and the different types of nameservers: the root nameservers, the TLD nameservers, and authoriative name servers. This is probably more detail than most students will need, but it can help understand the bigger picture, so is included here.


Updated: 2015-06-03

System design and analysis

Human interaction with the system

Human Computer Interaction (HCI)

Human Computer Interaction (HCI)

This page has very detailed notes on many human-computer interaction and usability issues. It has excellent interactive examples of bad user interfaces and the mistakes that software and hardware developers often make, including information about mode errors, user feedback, consistency, and error prevention. It also has links to further reading about HCI theory and design rules.


Updated: 2015-04-18
Psychology of Computing

Psychology of Computing

This video examines the issue of computer usability. It is full of great examples of user interface design, and explains the reasons behind them. Many of the items mentioned in the video are so common that we barely notice them in our daily lives, but the video links these choices to human psychology and our understanding of the real world.


Updated: 2017-12-15

Moral, ethical, social, economic, and environmental implications

NSA Internet surveillance

NSA Internet surveillance

In June 2013, the Guardian and Washington Post newspapers published revelations about a secret, quasi-legal US government Internet surveillance programme known as PRISM and operated by the National Security Agency (NSA). In the following weeks global media continued publishing revelations of ever more extraordinary surveillance systems. First, revelations that the NSA had worked with the British intelligency agency GCHQ to side-step legal issues, then evidence that online images were being collected and mined, and finally, confirmation that thousands of mobile phones had been monitored and tracked. Foreign allies were quickly alienated as it was revealed that the NSA had spied on supposedly friendly governments and ministers, including the Germans, Chileans, and Brazilians. The articles below highlight some of the key events in the scandal, and make excellent material for classroom discussion of the ethics of surveillance.


Updated: 2015-05-06
Enemy of the State DVD

Enemy of the State DVD

Amazon.com | Amazon.co.uk | Instant Video

Many of the surveillance technologies and methods featured in Enemy of the State - which features Will Smith as a lawyer tracked down by government agents - may seem pure fantasy. However, recent revelations about NSA spying once again make this a relevant and pertinent film that deals with contemporary issues.


Updated: 2015-05-06
United States of Secrets PBS documentary

United States of Secrets

A compelling two-part PBS documentary about the US government (and particularly the NSA's) warrantless surveillance of the Internet of millions, which was only revealed after Edward Snowden leaked classified information

The documentary does a good job of addressing both sides of the surveillance argument, featuring interviews with government insiders, including those who were the architects of the now infamous surveillance systems.

Watch the documentary on the PBS website


Updated: 2015-05-06
Ethics in Computing

Ethics in Computing

Ethics in Computing covers a wide range of ethical situations from intellectual property to free speech and privacy. Different areas are covered - including government, medical, and educational. Each section is subdivided and has a plethora of links to case studies or news articles. This means some work is needed to find the most relevant articles, and the site itself is probably better suited to older students.


Updated: 2015-05-07