Just then the bell rang, calling them back to classes. The next class was with their own teacher – Mr Pythagoras. They all filed in and took their places.
Pythagoras emerged from behind his curtain and announced: “Today's lesson will be about the most important theorem in maths: the Pythagoras theorem. The Pythagoras theorem!” He raised his hands to the ceiling so that his sleeves fell away from his scrawny arms and at the same time raised his voice to nearly a shout. “I heard the voices of the gods echoing my triumph when I found out the proof of the theorem!”
