I have a pupil who started with me a few months ago but was already preparing for a grade exam this term. Her posture is not good, but I have not said much for now as it might make her playing temporarily worse. She will be taking the exam soon, so I am thinking about what needs to be done afterwards. I am not sure however how much I should correct her posture at the moment as she is still quite young and is small for her age. Would you do it now, or wait until she has grown a bit, as it will probably need adjusting then anyway? She has been playing a couple of years and there is no way she was big enough for a full size flute then (she isn't really now!), which is probably the root of the problem.
The one thing I will definitely do is get her to put her left elbow down (and consequently her shoulder) - it is right up in the air above the flute, and when I mentioned it to her, she said she was always told to do this. I've come across this before - does anybody know the reasoning behind it? It seems to me it just creates tension in the neck and shoulder, as well as making it harder to reach with the lower fingers..