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Twenty Guesses - Information Theory

This resource asks the question ‘How much information is there in a thousand page book?’ It continues by exploring how to estimate how much space is needed to store the information and introduces a way of measuring information content. The resource begins by discussing what is meant by information and how amounts...

Colour by Numbers - Image representation

Computers store drawings, photographs and other pictures using only numbers. The following activity demonstrates how they can do this. This resource includes ideas teachers can use to introduce the topic in order to develop understanding of image representation followed by two activities to be used as reinforcement...

Count the Dots - Binary Numbers

Data in computers is stored and transmitted as a series of zeros and ones. In this activity students explore how words and numbers can be represented using just these two symbols. This resource includes ideas teachers can use to introduce the topic in order to develop understanding of the binary system followed by...

Card Flip Magic - Error Detection

When data is stored on a disk or transmitted from one computer to another, it is usually assumed that it doesn’t get changed in the process. But sometimes things go wrong and the data is changed accidentally. This activity uses a magic trick to show how to detect when data has been corrupted, and how to correct it...

You Can Say That Again! - Text Compression

Computers only have a limited amount of space to hold information, so they need to represent information as efficiently as possible. This is called compression. By coding data before it is stored, and decoding it when it is retrieved, the computer can store more data, or send it faster through the Internet. This...

Selecting Search Results

This Barefoot Computing primary school resource helps children to Understand how search engines work. By acting as a ‘web crawler’ and collecting information across a small selection of web pages, they learn what in data is indexed by search engines and how this is used when a search query is received. As well as...

Scratch Maths Quiz Variables

This Barefoot Computing resource builds on the ‘Maths quiz with selection’ learning activities which should be undertaken first.

It involves improving an existing Scratch maths quiz and adding score-keeping using variables – a quiz Scratch file is provided for students who do not have access to one they made...

Debugging a Scratch game

A small resource which includes a "debugging strategy" sheet with suggestions to students as to how to proceed. It also contains a bug-ridden Scratch game. The activity requires students to identify and fix the bugs. Although this is a single worksheet activity, it can serve as an example/template for a whole host...

Debugging system for students

A resource which provides learners with a user friendly strategy to utilise when they come across a bug they do not understand. SNOT stands for Self, Neighbour, Other, Teacher, and it includes a framework for recording who students have sought help from, and who they have helped along with record sheets to record...

Networks and communications unplugged

A scheme of work which although aimed at the upper end of Key Stage 2, is also suitable for delivery at the bottom end of Key Stage 3. The scheme contains a whole host of unplugged and plugged activities surrounding networks and communications, including the difference between the internet and the world wide web,...

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