In celebration of its founder, Fritz Schumacher’s centenary year Practical Action have created Small Is...Challenge. Schumacher’s philosophy was based on the idea that even a small change can have a big impact on people’s lives. The challenge for students is to look at technologies from the last 100 years and...

A big idea in chemistry is the idea of how substances behave and change. This is important because we are surrounded by objects made from different materials, each with their own physical properties that make them suitable or unsuitable for different purposes. How substances behave helps us to categorise them into...