After a horrendous couple of weeks in a very large and difficult school I've not been asked to return even though I was booked there for a few days longer. Apparently my agency have told me this is because of a 'parental complaint' but no further information was given. They said that the Head had 'investigated it' and come to the conclusion I shouldn't be re-booked. They let me see out the day though - I certainly wasn't marched out the door or anything as sudden as that. Trouble is, I don't have a clue what they're on about. Can't think of a single thing that I've done wrong, least of all been spoken to about it by anybody senior. That only thing I can think of is that I've had to be quite strict with a few of classes due to poor behaviour and perhaps one pupil on the receiving end of a sanction has gone home to parents and made an issue of it. But other than that I'm in the dark. Is this normal for a supply teacher to be given the boot so quickly and mercilessly like that? Is it something I should be worried about?