The bespectacled young maths teacher in the advertisement for AQA on page 5 of last week’s TES announces that he is “ready for the big changes in maths”.

I hadn’t realised just how big those changes are. On the whiteboard behind him he has labelled the longest side of a right-angled triangle as being the opposite, and one of the shorter sides as being the hypotenuse. These are no mere changes: they are revolutions.

Or perhaps he is not quite as ready as he thinks to be teaching mathematics. Perhaps he should stick to modelling.

Matthew Handy, Director of mathematics, Dot Maths.