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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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 Amazon.com | Amazon.co.uk | Book Depository This bo...

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...

Data Structures

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...

5.2 The Internet and the World Wide Web

5.2.1 Internet Structure

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 the Internet Works activity

How the Internet Works

This kinesthetic activity involves students acting out various parts of the Internet including websites, routers, servers, and clients. It starts by examining swtiching networks (e.g. telephone systems) before looking at routing networks such as the Internet.

This is quite a complex activity which requires some preparation and setting up, but when this is done it is an excellent way to help students understand these topics. Thorough instructions are given in three blog posts linked from the CSE4K12 page. It is also possible to vary the difficulty level by including fewer aspects, making it suitable for students of different age groups.

This activity was created for Computer Science & Engineering for K-12 by Gary Kacmarcik, and is licensed as Creative Commons Attribution-Share Alike.

Updated: 2015-05-14
Internet Routing

IP addressing and routing

The final part of this BBC Computer Science page deals with issues of IP addressing and routing.

Updated: 2016-03-27
Internet backbone map

Greg's Cable Map

Greg's Cable Map is an excellent site with an interactive map showing the location of major Internet backbones across the world. This is a great resource for helping students visualise just how Internet routing works.

Updated: 2016-03-27
Fibre optic cables

How undersea cables are laid

This short video makes a good lesson starter or discussion prompt. It shows how fibre optic cables used for Internet backbones are laid beneath oceans. This is really useful for showing students that Internet routing is not a complicated or mythical process but, in fact, one which uses relatively basic technology.

Updated: 2016-04-05
How the Internet works

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.

Updated: 2016-04-05

5.2.2 The World Wide Web

5.2.3 HTML and CSS

Creating a Website

Creating a Website: The Missing Manual

Amazon.com | Kindle (US) | Kindle (UK) | Book Depository (free worldwide shipping)

Creating a Website introduces students to creating correct HTML and CSS code without overwhelming them with details of uncommon or rarely used features. It is well laid out, enabling students to find example code for their particular requirements with ease, making it a useful reference book. However, it is not a tutorial or 'howto' book, so it needs using as part of planned lesson activities or independent projects.

Updated: 2015-05-02

5.2.4 Clients and Servers


Follow the Cookie Trail

In this video Computerphile explains the problems that cookies solve, why they are used on many modern sites, and how they work. It also discusses the difference between first party and third party cookies, and does a particularly good job of explaining how third party cookies raise privacy issues. The video also includes coverage of recent European legislation regarding cookies and user tracking.

Updated: 2015-05-27