Crab Claws

I've been at school today helping out with the Year 11s Maths Bridging Course. Our Sixth Form run a course for anyone applying for A-Level Maths who hasn't done Additional Maths or isn't predicted an A* just to make sure they'll be able to cope with the course and the Head of Maths asked if I wanted to help.

Today they were going through changing the subject and then factorising and one of the methods is called "crab claws" so I thought I'd blip a photo of my wooden crab that I bought from Cuba a few years ago.