Revision notes, activities, lesson plans, teaching ideas, and other resources for GCSE, A-Level, and IB Computer Science teachers and students.
Boolean logic worksheet pack
These three Boolean logic worksheets have exam style questions on logic sta...
Edexcel Computer Science (9-1)
by Ann Weidmann et al
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Dijkstra's algorithm video
This video is probably the best explanation of Dijkstra's algorithm for IB ...
Input-Process-Output (IPO) Model
The Input-Process-Output model is a simple topic but some students sometime...
A comprehensive review of hexadecimal. The video covers not only how to u...
Subprograms, Local Variables & Structured Programming
Subprograms are known by several different names - methods, functions, proc...
Utility Software and Models
Some students find the difference between operating system software and ut...
This video explains different types of data structures - 1 dimensional ar...
Operating System (OS) - GCSE Computer Science
A detailed overview of operating systems, starting with the general tasks t...
3.5 Fundamentals of Computer Networks
Click here for recommended AQA GCSE Computer Science textbooks.
A Guide to How the Internet Works
This smart-looking Prezi presentation by Phil Bagge is packed full of great graphics and makes a really use introduction to the Internet topic. It takes a clear and visual approach to the idea of a 'network of networks', and really helps students see the structure of the Internet.
Edexcel GCSE Computer Science: Networks
This video covers Topic 5.1 Networks from the Edexcel syllabus. This topic is very theory heavy, which makes this video a long but useful revision resource for GCSE students.
Computer Networks: Crash Course Computer Science
This 12 minute video gives a rapid overview of computer networks. Despite its short running time, a lot of topics are covered, including MAC addresses, ethernet cables, and networking hardware. Some of the concepts (e.g. collisions) may not be relevant to all Computer Science courses, but their explanations are often linked to other related concepts (for example, collisions is linked to bandwidth which in turn is linked to switches).
Video: There and Back Again: A Packet's Tale. How Does the Internet Work?
A really accessible overview of packet switching, using the example of accessing a web page. The steps are broken down and explained with real life examples, as a web page hosted in the US is fetched by a computer in the UK.
Video: How does the internet work? - James May's Q&A
This video with James May takes a while to get going, but about half way through it starts to put concepts together and make it clear how the Internet works. Everything is explained clearly and in easy to understand language.
Types of network: PAN, WAN, LAN, and WLAN
Very clear diagrams and explanations of PAN, LAN, WLAN, and WAN. The diagrams are clear and include the location of key hardware such as switches, clients, and servers.The following pages also have good coverage of the other Computer Science networking topics, including network topologies.
Computer Network Types is a short but clear explanation of the main types of networks in Computer Science. It covers PAN, LAN, MAN, and WAN with very clear diagrams and explanations.
About Tech has one of the better explanations of network cable types, covering the essentials including coaxial, twisted pair, and fibre optic. The hyperlink-studded text makes it easy to students to find out about any related terms or concepts which confuse them.
BBC Bitesize has clear revision materials for the three main network topologies: star network, bus network, and ring network. As always, their diagrams are very clear and easy to understand, and each topology has a clear table of its advantages and disadvantages.
In this simple game students must attempt to corrupt, kill, or delay data packets as they are sent across the screen. This game might now seem very educational at first, but on later levels (5 onwards) the data transmitted has additional features to detect corruption. For example, packets are sent with a sequence number (just like an IP packet), so delaying a packet no longer causes problems. This game can lead to some good classroom discussions about how network protocols prevent the problems shown in the game.