It's all too easy to put your foot in it, especially in the last end of the day when you're half asleep and not fully with it. My year tens were discussing their results from a recent bout of exams:

'Sir I got an A* in Child Development'

'Does that mean you're good at developing children?'

As soon as the words had slipped out I realised what I'd said. I hadn't meant it like that. Really. It wasn't even one of the pupils who I reckon practise making babies every weekend.

It's year ten parents' evening tomorrow - I think I'll feel a little sheepish when I see that particular set of parents.