I’ve just had a teaching moment. I don’t know if other retired teachers get these, or if they just wake up sweating in the night, convinced they haven’t done the planning, or the marking, or that their students haven’t reached the required level, or that they haven’t prepared for the lesson observation tomorrow, or that OFSTED are coming…… No, it wasn’t one of those. It was a positive moment.
I’ve just seen a new £1 coin for the first time. For those of you not in the UK (I am delighted to say that quite a few occasionally read this blog) the coin is 12- sided, slightly larger than the old coin and designed to foil forgers.
All of a sudden, my mind switched into teacher mode. Wouldn’t this be a great maths lesson theme? Imagine the fun able (and not so able) primary children could have with it.
Think of the questions that could be asked. What shape is the outline? (A dodecagon. Roughly, it’s slightly curved.) What 3D shape is it? (A dodecagonal prism. Again, roughly.) What are its width and thickness? How heavy is it? (Dunno….. How could you work it out? It’s too small for conventional scales.) How many of the new ones weigh how many of the old ones? What numbers does it have on it? How many make a kilogram… or how much would a kilogram of £1 coins be worth? How high would £100 in £1 coins be? And on, and on….. Draw it…. without drawing round it. Then there’s research work: how many will be in circulation? When will the old one be withdrawn?
Actually, this would be a great homework. You could pose a few questions and then ask the students to ask more. However, as usual, some parents would prepare a huge dossier without any child input.
Sadly, I got very excited about this, then just a little sad that I couldn’t do it. Only a little sad, mind you. By the way, my teaching nightmares usually involve me not being able to find a coffee mug at breaktime and getting back to the class late. That’s sad.
I’d be delighted to find that somebody has already thought of this, but even more delighted to find that somebody else has used it. Or perhaps it doesn’t fit whatever the latest curriculum might be.
(The image attached is labelled for non-commercial re-use; I know this can be a tricky area where currency is concerned. However, I don’t think this one will help forgers very much. It’s probably courtesy the Royal Mint.)