For any of you who wish to hear the Maths and Physics songs in their glorious unedited entirety, they can now be found online at:
http://www.teachingideas.co.uk/maths/ma ... lodies.htm
being called 'Trousers To Your Feet' and 'As Mrs Newton Once Said', respectively. The lyrics are available too.
Personally I think 'The Maths Song' and 'The Physics Song' make snappier titles, but I'll have to argue that one out with Andrew next time I see him!