This set of activities introduces children to cryptography techniques, showing how the use of computers can make encryption quicker and more effective. Some notable examples of the use of encryption in history are mentioned, leading to the use of calculation machines for code-making and code-breaking.

A...

This short unplugged activity, away from computers, introduces pattern recognition using familiar objects. Children are asked to analyse groups of objects (cats, cars and so on) to identify features common to all of them. Exceptions to the 'rules' are discussed, and parallels with writing computer programs are...

In this activity children take on the role of Earth observation scientists submitting a request for an image they would like for their research. This gives them the opportunity to consider the possibilities of pictures taken from orbit (and the limitations) and to write scientifically for a specific audience. It...