Remember to forget

Some children noticed this sign on the calculator. It's really not a Year 4 thing. Don't worry about it.

So as to put everyone's mind at rest we explained it in class. But only so that we can now forget about it. If your Year 5 teacher asks whether you ever learnt about square roots, just stare at them blankly, with possibly some puzzled shaking of the head. The take-home message is this: "Forget about square roots."