"Computing isn't about computers" - this quote from one of the CS4FN authors, Paul Curzon, should give you an idea about the resources in this collection. Designed to inspire, these activities are about people, solving puzzles, creativity, changing the future and, most of all, having fun. Magic tricks, philosophy,...

Encryption is the key to information security. The key to modern encryption is that using only public information, a sender can lock up their message in such a way that it can only be unlocked by the intended recipient. The resource begins with a detailed explanation of the activity and how the process of...

Cryptographic techniques enable information to be shared with other people, yet still maintain a surprisingly high level of privacy. This activity illustrates a situation where information is shared, and yet none of it is revealed: a group of students will calculate their average age without anyone having to reveal...

The Computing at School newsletter is published three times a year. It is full of practical ideas for teachers of computing in primary and secondary schools, with articles contributed by a number of CAS members. With input from teachers, academics, advisors and industry professionals, it provides a varied source of...

This activity shows how to accomplish a simple, but nevertheless seemingly impossible task -making a fair random choice by flipping a coin, between two people who don’t necessarily trust each other, and are connected only by a telephone. The resource begins with a detailed explanation of the activity and...