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Pizzas come in a range of sizes. If you’ve ever wondered whether to get one big or two small pizzas, this experiment might be able to help!

Round circular graphs are known as pie charts. That name gave us an idea – what if they were made from pies?

You might think you’ve got a good handle on distance. But not all things measure distance the same way – what if you were a chess piece?

This crafty cog activity will get your mind spinning and help you learn more about how we count. Safety: This activity uses a craft knife. Ask an adult to help.

If you read scientific reports closely, you will come across words such as error and uncertainty. What do they mean? If a teacher tells you that you made an error on a test, then you got something wrong. In everyday language, that’s what error often means – a mistake.

Written by Emma Bastian How do you weigh a dinosaur? It’s a simple question with a very complex answer.

Take a sheet of A4 paper and measure its sides. A4 is 210 millimetres wide and 297 millimetres long. It’s probably the most common size of paper and it’s used in most countries. However, A4 side lengths aren’t simple numbers like 200 or 300 millimetres. So why don’t we use something easier to measure?