Definition: A substance with electrical properties intermediate between a good conductor and a good insulator.

Alright class, settle down, let’s take a look today, At something called a ‘semiconductor,’ in a clever way! The dictionary gives us the gist, it's true, “A substance with electrical properties… between two!” Now, think about electricity, a flowing stream, Some materials let it rush, like a joyful dream. These are conductors, bright and bold, Like copper wires, stories to be told! Others resist the flow, they hold it tight, Insulators stand strong, bathed in dim light. But semiconductors… well, that’s where it gets keen, They're somewhere in between, a fascinating scene! They aren’t quite as eager to let current slide, Nor are they completely blocked, nowhere to hide. Think of it like this: they can sometimes allow, The electricity to pass, then stop and slow down. This ability to change, that's the key you see, Is what makes semiconductors so valuable, for you and me! They’re used in computers, phones, and quite a lot, Controlling the flow of power – it’s truly sought! Does that make sense? Do you have any questions about this little piece of science? Let's discuss!