QUOTE(Rosemary7391 @ Nov 17 2007, 06:44 PM)

Could you not stnd up the top of the keyboard and hit the relevant sharp/flat when required - creating a nasty dissonance if they forget? It might remind them, and if it doesn't sound nice they're more likely to want to avoid it. Possibly?
Oboist, so that doesn't work... I could squeek something horrible when they make a mistake I guess, but by the time I've got the instrument in my mouth the note will be far behind!
I don't want to go down the highlighter pen, or even pencil, route as I don't think it'll really help them in the long term. I will pencil a sharp/flat in occasionally if they are basically playing the piece correctly but consistently forgetting it in one place, but I don't really like doing it. (But I do it for my own pieces, so it'd be hypocritical not to!)
I've tried getting them to spot the notes which need the sharp/flat before they start, and they can happily do that, but still forget when it comes to playing!
I have tried threatening to fine them a pound for every time they forget, which does have some effect, but you can only do it once because they quickly work out that you don't really mean it!
Violinia, I completely agree about the singing, and the fact that they don't *hear* the music in their heads before they play it. Trouble is, some of the time the piece sounds reasonably okay with the 'wrong' key signature, so they don't really notice. If it really obviously wrong, I stop them and ask them if they think it sounds right, and they agree that it doesn't - but it's too late by then! Also, especially after about grade 5, I make them play a lot of C20 music (oboe repertoire being mostly only Baroque or C20 anyway...), so the 'wrong' notes are less obvious.
Hmmm. Maybe I need to force them to do more singing! (That will go down well....)