My earlier theory on rain...

Earlier I mentioned that it's guaranteed to rain on Thursdays since I have outside duty at school. Well, last Thursday was the first Thursday that it hasn't rained. Not only that, but I found a brand new board rubber (eraser) lying on the ground. When I brought it inside to use, I mentioned to my year 7 students that I found it outside.

'But Sir,' one of them said, 'you don't know where it's been!'

Nice to know they're looking out for me.